10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

☒       QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2022

OR

☐       TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission File Number 001-36541

LIMBACH HOLDINGS, INC.

(Exact name of registrant as specified in its charter)

Delaware, USA	46-5399422
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
797 Commonwealth Drive, Warrendale, Pennsylvania	15086
(Address of principal executive offices)	(Zip Code)

1-412-359-2100

(Registrant’s telephone number, including area code)

1251 Waterfront Place, Suite 201 Pittsburgh, Pennsylvania	15222
(Former Address of principal executive offices)	(Former Zip Code)

(Former name, former address and former fiscal year, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class	Trading Symbol(s)	Name of Each Exchange on Which Registered
Common Stock, par value $0.0001 per share	LMB	The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes  ☒    No   ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  ☒     No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☐	Accelerated filer	☒
Non-accelerated filer	☐	Smaller reporting company	☒
		Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐   No  ☒

As of May 9, 2022, there were 10,423,068 shares of the registrant’s common stock, $0.0001 par value per share, outstanding.

LIMBACH HOLDINGS, INC.

TABLE OF CONTENTS

Part I.
Item 1.	Financial Statements (Unaudited)	1
	Condensed Consolidated Balance Sheets as of March 31, 2022 and December 31, 2021	1
	Condensed Consolidated Statements of Operations for the Three Months Ended March 31, 2022 and 2021	2
	Condensed Consolidated Statement of Stockholders’ Equity for the Three Months Ended March 31, 2022 and 2021	3
	Condensed Consolidated Statements of Cash Flows for the Three Months Ended March 31, 2022 and 2021	4
	Notes to Condensed Consolidated Financial Statements	5
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	24
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	36
Item 4.	Controls and Procedures	36
Part II.
Item 1.	Legal Proceedings	37
Item 1A.	Risk Factors	37
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	37
Item 3.	Defaults Upon Senior Securities	37
Item 4.	Mine Safety Disclosures	37
Item 5.	Other Information	37
Item 6.	Exhibits	38
Signature		39

PART I. FINANCIAL INFORMATION

Item 1. Financial Statements

LIMBACH HOLDINGS, INC.

Condensed Consolidated Balance Sheets (Unaudited)

(in thousands, except share and per share data)	March 31, 2022		December 31, 2021
ASSETS
Current assets:
Cash and cash equivalents	$	18,066	$	14,476
Restricted cash	113		113
Accounts receivable (net of allowance for doubtful accounts of $270 and $263 as of March 31, 2022 and December 31, 2021, respectively)	108,969		89,327
Contract assets	75,543		83,863
Income tax receivable	161		114
Other current assets	7,143		5,013
Total current assets	209,995		192,906
Property and equipment, net	20,759		21,621
Intangible assets, net	16,508		16,907
Goodwill	11,370		11,370
Operating lease right-of-use assets	17,719		20,119
Deferred tax asset	4,407		4,330
Other assets	245		259
Total assets	$	281,003	$	267,512
LIABILITIES
Current liabilities:
Current portion of long-term debt	$	13,222	$	9,879
Current operating lease liabilities	3,762		4,366
Accounts payable, including retainage	63,734		63,840
Contract liabilities	34,444		26,712
Accrued income taxes	—		501
Accrued expenses and other current liabilities	26,428		24,444
Total current liabilities	141,590		129,742
Long-term debt	34,220		29,816
Long-term operating lease liabilities	14,787		16,576
Other long-term liabilities	3,535		3,540
Total liabilities	194,132		179,674
Commitments and contingencies (Note 13)
STOCKHOLDERS’ EQUITY
Common stock, $0.0001 par value; 100,000,000 shares authorized, 10,423,068 issued and outstanding as of March 31, 2022 and 10,304,242 at December 31, 2021	1		1
Additional paid-in capital	85,553		85,004
Retained Earnings	1,317		2,833
Total stockholders’ equity	86,871		87,838
Total liabilities and stockholders’ equity	$	281,003	$	267,512

The accompanying notes are an integral part of these condensed consolidated financial statements

1

LIMBACH HOLDINGS, INC.

Condensed Consolidated Statements of Operations (Unaudited)

	Three Months Ended March 31,
(in thousands, except share and per share data)	2022		2021
Revenue	$	114,822	$	113,344
Cost of revenue	96,482		96,115
Gross profit	18,340		17,229
Operating expenses:
Selling, general and administrative	18,734		17,145
Amortization of intangibles	399		104
Total operating expenses	19,133		17,249
Operating loss	(793)		(20)
Other (expenses) income:
Interest expense, net	(486)		(1,264)
Loss on disposition of property and equipment	(36)		(86)
Loss on early termination of operating lease	(817)		—
Loss on early debt extinguishment	—		(1,961)
Gain on change in fair value of warrant liability	—		14
Total other expenses	(1,339)		(3,297)
Loss before income taxes	(2,132)		(3,317)
Income tax benefit	(616)		(1,035)
Net loss	$	(1,516)	$	(2,282)
Earnings Per Share (“EPS”)
Loss per common share:
Basic	$	(0.15)	$	(0.25)
Diluted	$	(0.15)	$	(0.25)
Weighted average number of shares outstanding:
Basic	10,420,690		9,218,087
Diluted	10,420,690		9,218,087

The accompanying notes are an integral part of these condensed consolidated financial statements

2

LIMBACH HOLDINGS, INC.

Condensed Consolidated Statements of Stockholders’ Equity (Unaudited)

	Common Stock
(in thousands, except share amounts)	Number of shares outstanding	Par value amount		Additional paid-in capital		Accumulated deficit		Stockholders’ equity
Balance at December 31, 2021	10,304,242	$	1	$	85,004	$	2,833	$	87,838
Stock-based compensation	—	—		599		—		599
Shares issued related to vested restricted stock units	105,928	—		—		—		—
Tax withholding related to vested restricted stock units	—	—		(148)		—		(148)
Shares issued related to employee stock purchase plan	12,898	—		98		—		98
Net loss	—	—		—		(1,516)		(1,516)
Balance at March 31, 2022	10,423,068	$	1	$	85,553	$	1,317	$	86,871

	Common Stock
(in thousands, except share amounts)	Number of shares outstanding	Par value amount		Additional paid-in capital		Accumulated deficit		Stockholders’ equity
Balance at December 31, 2020	7,926,137	$	1	$	57,612	$	(3,881)	$	53,732
Stock-based compensation	—	—		677		—		677
Shares issued related to vested restricted stock units	89,446	—		—		—		—
Tax withholding related to vested restricted stock units	—	—		(183)		—		(183)
Shares issued related to employee stock purchase plan	8,928	—		92		—		92
Shares issued related to the exercise of warrants	172,869	—		1,989		—		1,989
Shares issued related to sale of common stock	2,051,025	—		22,773		—		22,773
Net loss	—	—		—		(2,282)		(2,282)
Balance at March 31, 2021	10,248,405	$	1	$	82,960	$	(6,163)	$	76,798

The accompanying notes are an integral part of these condensed consolidated financial statements

3

LIMBACH HOLDINGS, INC.

Condensed Consolidated Statements of Cash Flows (Unaudited)

	Three Months Ended March 31,
(in thousands)	2022		2021
Cash flows from operating activities:
Net loss	$	(1,516)	$	(2,282)
Adjustments to reconcile net loss to cash used in operating activities:
Depreciation and amortization	2,062		1,495
Provision for doubtful accounts	56		28
Stock-based compensation expense	599		677
Noncash operating lease expense	1,157		1,043
Amortization of debt issuance costs	32		190
Deferred income tax provision	(77)		(336)
Loss on sale of property and equipment	36		86
Loss on early termination of operating lease	817		—
Loss on early debt extinguishment	—		1,961
Gain on change in fair value of warrant liability	—		(14)
Changes in operating assets and liabilities:
Accounts receivable	(19,698)		2,584
Contract assets	8,320		(1,986)
Other current assets	(2,130)		(2,025)
Accounts payable, including retainage	(105)		(8,813)
Prepaid income taxes	(47)		—
Accrued taxes payable	(501)		(654)
Contract liabilities	7,732		(8,853)
Operating lease liabilities	(1,117)		(994)
Accrued expenses and other current liabilities	1,419		513
Other long-term liabilities	(4)		5
Net cash used in operating activities	(2,965)		(17,375)
Cash flows from investing activities:
Proceeds from sale of property and equipment	39		226
Purchase of property and equipment	(169)		(221)
Net cash used in (provided by) investing activities	(130)		5
Cash flows from financing activities:
Proceeds from Wintrust Term Loan (as defined in Note 6)	—		30,000
Payments on Wintrust and A&R Wintrust Term Loans	(1,857)		(500)
Proceeds from A&R Wintrust Revolving Loan (as defined in Note 6)	9,400		—
Payments on 2019 Refinancing Term Loan (as defined in Note 6)	—		(39,000)
Prepayment penalty and other costs associated with early debt extinguishment	—		(1,376)
Proceeds from the sale of common stock	—		22,773
Proceeds from the exercise of warrants	—		1,989
Payments on finance leases	(660)		(667)
Payments of debt issuance costs	—		(593)
Taxes paid related to net-share settlement of equity awards	(363)		(384)
Proceeds from contributions to Employee Stock Purchase Plan	165		167
Net cash provided by financing activities	6,685		12,409
(Decrease) increase in cash, cash equivalents and restricted cash	3,590		(4,961)
Cash, cash equivalents and restricted cash, beginning of period	14,589		42,260
Cash, cash equivalents and restricted cash, end of period	$	18,179	$	37,299
Supplemental disclosures of cash flow information
Noncash investing and financing transactions:
Right of use assets obtained in exchange for new operating lease liabilities	$	—	$	156
Right of use assets obtained in exchange for new finance lease liabilities	864		87
Right of use assets disposed or adjusted modifying operating lease liabilities	(1,276)		36
Right of use assets disposed or adjusted modifying finance lease liabilities	(19)		—
Interest paid	459		1,319
Cash paid (received) for income taxes	$	9	$	(45)

    

The accompanying notes are an integral part of these condensed consolidated financial statements

4

LIMBACH HOLDINGS, INC.

Notes to Condensed Consolidated Financial Statements (Unaudited)

Note 1 – Business and Organization

Limbach Holdings, Inc. (the “Company,” “we” or “us”), a Delaware corporation headquartered in Warrendale, Pennsylvania, was formed on July 20, 2016 as a result of a business combination with Limbach Holdings LLC (“LHLLC”). The Company is an integrated building systems solutions firm whose expertise is in the design, modular prefabrication, installation, management and maintenance of heating, ventilation, air-conditioning (“HVAC”), mechanical, electrical, plumbing and controls systems. The Company provides comprehensive facility services consisting of mechanical construction, full HVAC service and maintenance, energy audits and retrofits, engineering and design build services, constructability evaluation, equipment and materials selection, offsite/prefabrication construction, and the complete range of sustainable building solutions. The Company's customers operate in diverse industries including, but not limited to, healthcare, life sciences, data centers, industrial and light manufacturing, entertainment, education and government. The Company operates primarily in the Northeast, Mid-Atlantic, Southeast, Midwest, and Southwestern regions of the United States.

The Company operates in two segments, (i) General Contractor Relationships (“GCR”), in which the Company generally manages new construction or renovation projects that involve primarily HVAC, plumbing, or electrical services awarded to the Company by general contractors or construction managers, and (ii) Owner Direct Relationships (“ODR”), in which the Company provides maintenance or service primarily on HVAC, plumbing or electrical systems, building controls and specialty contracting projects direct to, or assigned by, building owners or property managers. This work is primarily performed under fixed price, modified fixed price, and time and material contracts over periods of typically less than two years.

Note 2 – Significant Accounting Policies

Basis of Presentation

References in these financial statements to the Company refer collectively to the accounts of Limbach Holdings, Inc. and its wholly-owned subsidiaries, including LHLLC, Limbach Facility Services LLC (“LFS”), Limbach Company LLC, Limbach Company LP, Harper Limbach LLC, Harper Limbach Construction LLC, Limbach Facility & Project Solutions LLC, Jake Marshall, LLC (“JMLLC”) and Coating Solutions, LLC (“CSLLC”) for all periods presented, unless otherwise indicated. All intercompany balances and transactions have been eliminated.

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) for interim financial information and with the requirements of Form 10-Q and Rule 8-03 of Regulation S-X for smaller reporting companies. Consequently, certain information and note disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to those rules and regulations, although the Company believes that the disclosures made are adequate to make the information not misleading. Readers of this report should refer to the consolidated financial statements and the notes thereto included in the Company's most recent Annual Report on Form 10-K filed with the Securities and Exchange Commission (“SEC”) on March 16, 2022.

Use of Estimates

The preparation of the condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements for assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, the reported amounts of revenue and expenses during the reported period, and the accompanying notes. Management believes that its most significant estimates and assumptions have been based on reasonable and supportable assumptions and the resulting estimates are reasonable for use in the preparation of the condensed consolidated financial statements. The Company’s significant estimates include estimates associated with revenue recognition on construction contracts, costs incurred through each balance sheet date, intangibles, property and equipment, fair value accounting for acquisitions, insurance reserves and contingencies. If the underlying estimates and assumptions upon which the condensed consolidated financial statements are based change in the future, actual amounts may differ from those included in the accompanying condensed consolidated financial statements.

Unaudited Interim Financial Information

The accompanying interim Condensed Consolidated Balance Sheets, Condensed Consolidated Statements of Operations, Condensed Consolidated Statements of Stockholders’ Equity and Condensed Consolidated Statements of Cash Flows for the periods presented are unaudited. Also, within the notes to the condensed consolidated financial statements, the Company has included unaudited information for these interim periods. These unaudited interim condensed consolidated financial statements

5

have been prepared in accordance with GAAP. In the Company's opinion, the accompanying unaudited condensed consolidated financial statements contain all normal and recurring adjustments necessary for a fair statement of the Company’s financial position as of March 31, 2022, its results of operations and its cash flows for the three months ended March 31, 2022. The results for the three months ended March 31, 2022 are not necessarily indicative of the results to be expected for the year ending December 31, 2022.

The Condensed Consolidated Balance Sheet as of December 31, 2021 was derived from the Company's audited financial statements included in its Annual Report on Form 10-K filed with the SEC on March 16, 2022, but is presented as condensed and does not contain all of the footnote disclosures from the annual financial statements.

Recently Adopted Accounting Standards

In November 2021, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers, which creates an exception to the general recognition and measurement principle for contract assets and contract liabilities from contracts with customers acquired in a business combination. Under this exception, an acquirer applies ASC 606, Revenue from Contracts with Customers, to recognize and measure contract assets and contract liabilities on the acquisition date. ASC 805 generally requires the acquirer in a business combination to recognize and measure the assets it acquires and the liabilities it assumes at fair value on the acquisition date. The changes are effective for annual periods beginning after December 15, 2022. The Company early adopted ASU 2021-08 in December 2021. The contract assets and contract liabilities associated with the Jake Marshall Transaction have been valued in accordance with this standard.

Recent Accounting Pronouncements

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments, which introduced an expected credit loss methodology for the measurement and recognition of credit losses on most financial instruments, including trade receivables and off-balance sheet credit exposure. Under this guidance, an entity is required to consider a broader range of information to estimate expected credit losses, which may result in earlier recognition of losses. This ASU also requires disclosure of information regarding how a company developed its allowance, including changes in the factors that influenced management’s estimate of expected credit losses and the reasons for those changes. The guidance is effective for smaller reporting companies on January 1, 2023 with early adoption permitted. The adoption of this standard will be through a cumulative-effect adjustment to retained earnings as of the effective date. Based on its historical experience, the Company does not expect that this pronouncement will have a significant impact in its condensed consolidated financial statements or on the estimate of the allowance for doubtful accounts.

The FASB has issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting in March 2020. This new guidance provides optional expedients for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform, on financial reporting. The risk of termination of the London Interbank Offered Rate (LIBOR), has caused regulators to undertake reference rate reform initiatives to identify alternative reference rates that are more observable or transaction based that are less susceptible to manipulation. ASU 2020-04 is effective between March 12, 2020 and December 31, 2022.

In addition, in January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848): Scope. The amendments in this update refine the scope for certain optional expedients and exceptions for contract modifications and hedge accounting to apply to derivative contracts and certain hedging relationships affected by the discounting transition. The amendments in this update are effective for all entities as of March 12, 2020 through December 31, 2022. The Company is currently evaluating the impact of adopting the reference rate reform guidance (both ASU 2020-04 and ASU 2021-01) on its condensed consolidated financial statements. As discussed in Note 6, the A&R Credit Agreement removed LIBOR as a benchmark rate and now utilizes SOFR (as defined in the A&R Credit Agreement) as its replacement.

In August 2020, the FASB issued ASU 2020-06, Debt - Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity's Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity's Own Equity, which simplifies the accounting for certain financial instruments with characteristics of liabilities and equity and amends the scope guidance for contracts in an entity's own equity. The ASU addresses how convertible instruments are accounted for in the calculation of diluted earnings per share by using the if-converted method. The guidance is effective for all entities for fiscal years beginning after March 31, 2024, albeit early adoption is permitted no earlier than fiscal years beginning after December 15, 2020. Management is currently assessing the impact of this pronouncement on its condensed consolidated financial statements.

6

Note 3 – Acquisitions

Jake Marshall Transaction

On December 2, 2021 (the “Effective Date”), the Company and LFS entered into a Membership Interest Purchase Agreement (the “Purchase Agreement”) with JMLLC, CSLLC (together with JMLLC, the “Acquired Companies” and each an “Acquired Company”) and the owners of the Acquired Companies (collectively, the “Sellers”), pursuant to which LFS purchased all of the outstanding membership interests in the Acquired Companies from the Sellers (the transactions contemplated by the Purchase Agreement collectively being the “Jake Marshall Transaction”). The Jake Marshall Transaction closed on the Effective Date. As a result of the Jake Marshall Transaction, each of the Acquired Companies became wholly-owned indirect subsidiaries of the Company. The acquisition expands the Company’s market share within its existing product and service lines.

Total consideration paid by the Company for the Jake Marshall Transaction at closing was $21.3 million (the “Closing Purchase Price”), consisting of cash paid to the Sellers, net of adjustments for working capital. Of the consideration paid to the Sellers, $1.0 million is being held in escrow for indemnification purposes. The purchase price is subject to customary post-closing adjustments. In addition, the Sellers may receive up to an aggregate of $6.0 million in cash, consisting of two tranches of $3.0 million, as defined in the Purchase Agreement, if the gross profit of the Acquired Companies equals or exceeds $10.0 million in (i) the approximately 13 month period from closing through December 31, 2022 (the “2022 Earnout Period”) or (ii) fiscal year 2023 (the “2023 Earnout Period”), respectively (collectively, the “Earnout Payments”). To the extent, however, that the gross profit of the Acquired Companies is less than $10.0 million, but exceeds $8.0 million, during any of the 2022 Earnout Period or 2023 Earnout Period, the $3.0 million amount will be prorated for such period.

Allocation of Purchase Price. The Jake Marshall Transaction was accounted for as a business combination using the acquisition method. The following table summarizes the final purchase price and estimated fair values of assets acquired and liabilities assumed as of the Effective Date, with any excess of purchase price over estimated fair value of the identified net assets acquired recorded as goodwill. As a result of the acquisition, the Company recognized $5.2 million of goodwill, all of which was allocated to the ODR segment and fully deductible for tax purposes. Such goodwill primarily related to anticipated future earnings. The following table summarizes the allocation of the fair value of the assets and liabilities of the Jake Marshall Transaction as of the Effective Date by the Company.

(in thousands)	Purchase Price Allocation
Consideration:
Cash	$	21,313
Earnout provision	3,089
Total Consideration	24,402
Fair value of assets acquired:
Cash and cash equivalents	2,336
Accounts receivable	7,165
Contract assets	1,711
Other current assets	164
Property and equipment	5,762
Intangible assets	5,710
Amount attributable to assets acquired	22,848
Fair value of liabilities assumed:
Accounts payable, including retainage	2,655
Accrued expenses and other current liabilities	570
Contract liabilities	462
Amount attributable to liabilities assumed	3,687
Goodwill	$	5,241

7

Note 4 – Revenue from Contracts with Customers

The Company generates revenue principally from fixed-price construction contracts to deliver HVAC, plumbing, and electrical construction services to its customers. The duration of its contracts generally ranges from six months to two years. Revenue from fixed price contracts is recognized on the cost-to-cost method, measured by the relationship of total cost incurred to total estimated contract costs. Revenue from time and materials contracts is recognized as services are performed. The Company believes that its extensive experience in HVAC, plumbing, and electrical projects, and its internal cost review procedures during the bidding process, enable it to reasonably estimate costs and mitigate the risk of cost overruns on fixed price contracts.

The Company generally invoices customers on a monthly basis, based on a schedule of values that breaks down the contract amount into discrete billing items. Costs and estimated earnings in excess of billings on uncompleted contracts are recorded as a contract asset until billable under the contract terms. Billings in excess of costs and estimated earnings on uncompleted contracts are recorded as a contract liability until the related revenue is recognizable. The Company classifies contract assets and liabilities that may be settled beyond one year from the balance sheet date as current, consistent with the length of time of the Company’s project operating cycle.

Contract assets

Contract assets include amounts due under retainage provisions and costs and estimated earnings in excess of billings. The components of the contract asset balances as of the respective dates were as follows:

(in thousands)	March 31, 2022		December 31, 2021		Change
Contract assets
Costs in excess of billings and estimated earnings	$	41,949	$	47,447	$	(5,498)
Retainage receivable	33,594		36,416		(2,822)
Total contract assets	$	75,543	$	83,863	$	(8,320)

Retainage receivable represents amounts invoiced to customers where payments have been partially withheld, typically 10%, pending the completion of certain milestones, satisfaction of other contractual conditions or the completion of the project. Retainage agreements vary from project to project and balances could be outstanding for several months or years depending on a number of circumstances such as contract-specific terms, project performance and other variables that may arise as the Company makes progress towards completion.

Contract assets represent the excess of contract costs and profits (or contract revenue) over the amount of contract billings to date and are classified as a current asset. Contract assets result when either: (1) the appropriate contract revenue amount has been recognized over time in accordance with ASC Topic 606, but a portion of the revenue recorded cannot be currently billed due to the billing terms defined in the contract, or (2) costs are incurred related to certain claims and unapproved change orders. Claims occur when there is a dispute regarding both a change in the scope of work and the price associated with that change. Unapproved change orders occur when a change in the scope of work results in additional work being performed before the parties have agreed on the corresponding change in the contract price. The Company routinely estimates recovery related to claims and unapproved change orders as a form of variable consideration at the most likely amount it expects to receive and to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. Claims and unapproved change orders are billable upon the agreement and resolution between the contractual parties and after the execution of contractual amendments. Increases in claims and unapproved change orders typically result from costs being incurred against existing or new positions; decreases normally result from resolutions and subsequent billings.

The current estimated net realizable value on such items as recorded in contract assets and contract liabilities in the condensed consolidated balance sheets was $39.9 million and $38.1 million as of March 31, 2022 and December 31, 2021, respectively. The Company currently anticipates that the majority of such amounts will be approved or executed within one year. The resolution of those claims and unapproved change orders that may require litigation or other forms of dispute resolution proceedings may delay the timing of billing beyond one year.

Contract liabilities

Contract liabilities include billings in excess of contract costs and provisions for losses. The components of the contract liability balances as of the respective dates were as follows:

8

(in thousands)	March 31, 2022		December 31, 2021		Change
Contract liabilities
Billings in excess of costs and estimated earnings	$	34,053	$	26,293	$	7,760
Provisions for losses	391		419		(28)
Total contract liabilities	$	34,444	$	26,712	$	7,732

Billings in excess of costs represent the excess of contract billings to date over the amount of contract costs and profits (or contract revenue) recognized to date. The balance may fluctuate depending on the timing of contract billings and the recognition of contract revenue.

Provisions for losses are recognized in the condensed consolidated statements of operations at the uncompleted performance obligation level for the amount of total estimated losses in the period that evidence indicates that the estimated total cost of a performance obligation exceeds its estimated total revenue.

The net underbilling position for contracts in process consisted of the following:

(in thousands)	March 31, 2022		December 31, 2021
Revenue earned on uncompleted contracts	$	679,170	$	758,450
Less: Billings to date	(671,274)		(737,296)
Net underbilling	$	7,896	$	21,154
(in thousands)	March 31, 2022		December 31, 2021
Costs in excess of billings and estimated earnings	$	41,949	$	47,447
Billings in excess of costs and estimated earnings	(34,053)		(26,293)
Net underbilling	$	7,896	$	21,154

Revisions in Contract Estimates

The following table summarizes the Company’s recorded revisions in its contract estimates for certain GCR and ODR projects for the three months ended March 31, 2022 and 2021 (includes material gross profit changes of $0.25 million or more).

	For the Three Months Ended March 31,
	2022			2021
(in thousands except number of projects )			Number of Projects			Number of Projects
Gross profit write-ups:
GCR	$	533	2	$	743	2
ODR	—		—	—		—
Total gross profit write-ups	$	533	2	$	743	2
Gross profit write-downs:
GCR	$	(604)	2	$	(768)	2
ODR	—		—	—		—
Total gross profit write-downs	$	(604)	2	$	(768)	2
Total gross profit write-downs, net	$	(71)		$	(25)

During the three months ended March 31, 2022, the Company recorded total net gross profit write-downs, regardless of materiality, of $1.4 million compared to total net gross profit write-downs of $0.5 million for the three months ended March 31, 2021.

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Remaining Performance Obligations

Remaining performance obligations represent the transaction price of firm orders for which work has not been performed and exclude unexercised contract options. The Company’s remaining performance obligations include projects that have a written award, a letter of intent, a notice to proceed or an agreed upon work order to perform work on mutually accepted terms and conditions.

As of March 31, 2022, the aggregate amount of the transaction prices allocated to the remaining performance obligations of the Company's GCR and ODR segment contracts were $340.7 million and $90.4 million, respectively. The Company currently estimates that 60% and 73% of its GCR and ODR remaining performance obligations as of March 31, 2022, respectively, will be recognized as revenue during the remainder of 2022, with the substantial majority of remaining performance obligations to be recognized within 24 months, although the timing of the Company's performance is not always under its control.

Additionally, the difference between remaining performance obligations and backlog is due to the exclusion of a portion of the Company’s ODR agreements under certain contract types from the Company’s remaining performance obligations as these contracts can be canceled for convenience at any time by the Company or the customer without considerable cost incurred by the customer.

Note 5 – Goodwill and Intangibles

Goodwill

Goodwill was $11.4 million as of March 31, 2022 and December 31, 2021 and is entirely associated with the Company's ODR segment. The Company tests its goodwill and indefinite-lived intangible assets allocated to its reporting units for impairment annually on October 1, or more frequently if events or circumstances indicate that it is more likely than not that the fair value of its reporting units and indefinite-lived intangible asset are less than their carrying amount. The Company has the option to assess goodwill for possible impairment by performing a qualitative analysis to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. A quantitative assessment is performed if the qualitative assessments results in a more-likely-than-not determination or if a qualitative assessment is not performed.

The Company did not recognize any impairment charges on its goodwill or intangible assets for the three months ended March 31, 2022 or March 31, 2021.

Intangible Assets

Intangible assets are comprised of the following:     

(in thousands)	Gross carrying amount		Accumulated amortization		Net intangible assets, excluding goodwill
March 31, 2022
Amortized intangible assets:
Customer relationships – GCR – Jake Marshall	$	570	$	(27)	$	543
Customer relationships – ODR – Jake Marshall	3,050		(134)		2,916
Customer relationships – ODR – Limbach	4,710		(3,555)		1,155
Favorable leasehold interests – Limbach	190		(86)		104
Backlog – GCR – Jake Marshall	260		(55)		205
Backlog – ODR – Jake Marshall	680		(143)		537
Trade name – Jake Marshall	1,150		(62)		1,088
Total amortized intangible assets	10,610		(4,062)		6,548
Unamortized intangible assets:
Trade name – Limbach(1)	9,960		—		9,960
Total unamortized intangible assets	9,960		—		9,960
Total amortized and unamortized assets, excluding goodwill	$	20,570	$	(4,062)	$	16,508

(1)    The Company has determined that its trade name has an indefinite useful life. The Limbach trade name has been in existence since the Company’s founding in 1901 and therefore is an established brand within the industry.

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(in thousands)	Gross carrying amount		Accumulated amortization		Net intangible assets, excluding goodwill
December 31, 2021
Amortized intangible assets:
Customer relationships – GCR – Jake Marshall	$	570	$	(6)	$	564
Customer relationships – ODR – Jake Marshall	3,050		(35)		3,015
Customer relationships – ODR – Limbach	4,710		(3,475)		1,235
Favorable leasehold interests – Limbach	190		(82)		108
Backlog – GCR – Jake Marshall	260		(14)		246
Backlog – ODR – Jake Marshall	680		(36)		644
Trade name – Jake Marshall	1,150		(15)		1,135
Total amortized intangible assets	10,610		(3,663)		6,947
Unamortized intangible assets:
Trade name – Limbach	9,960		—		9,960
Total unamortized intangible assets	9,960		—		9,960
Total amortized and unamortized assets, excluding goodwill	$	20,570	$	(3,663)	$	16,907

Total amortization expense for the Company's definite-lived intangible assets was $0.4 million and $0.1 million for the three months ended March 31, 2022 and 2021, respectively.

Note 6 – Debt

Long-term debt consists of the following obligations as of:

(in thousands)	March 31, 2022		December 31, 2021
A&R Wintrust Term Loan - term loan payable in quarterly installments of principal, (commencing in December 2021) plus interest through February 2026	33,024		34,881
A&R Wintrust Revolving Loan	9,400		—
Finance leases – collateralized by vehicles, payable in monthly installments of principal, plus interest ranging from 4.40% to 6.45% through 2025	5,317		5,132
Total debt	47,741		40,013
Less - Current portion of long-term debt	(13,222)		(9,879)
Less - Unamortized discount and debt issuance costs	(299)		(318)
Long-term debt	$	34,220	$	29,816

On February 24, 2021 (the “2021 Refinancing Date”), the Company refinanced its 2019 Refinancing Term Loan (as defined below) and 2019 Revolving Credit Facility (as defined below) with proceeds from the issuance of the Wintrust Term Loan (as defined below) (the “2021 Refinancing”). As a result of the 2021 Refinancing, the Company prepaid all principal, interest, fees and other obligations outstanding under the 2019 Refinancing Agreements (as defined below) and terminated its 2019 Refinancing Term Loan, 2019 Refinancing Revolving Credit Facility and the CB Warrants (as defined below). In addition, on the 2021 Refinancing Date, the Company recognized a loss on the early extinguishment of debt of $2.0 million, which consisted of the write-off of $2.6 million of unamortized discount and financing costs, the reversal of the $2.0 million CB warrants (defined below) liability and the prepayment penalty and other extinguishment costs of $1.4 million.

2019 Refinancing Agreement - 2019 Term Loans

On April 12, 2019 (the “2019 Refinancing Closing Date”), LFS entered into a financing agreement (the “2019 Refinancing Agreement”) with the lenders thereto and Cortland Capital Market Services LLC, as collateral agent and administrative agent and CB Agent Services LLC (“CB”), as origination agent. The 2019 Refinancing Agreement consisted of (i) a $40.0 million term loan (the “2019 Refinancing Term Loan”) and (ii) a new $25.0 million multi-draw delayed draw term loan (the “2019 Delayed Draw Term Loan” and, collectively with the 2019 Refinancing Term Loan, the “2019 Term Loans”). On November 14, 2019, the Company entered into an amendment to the 2019 Refinancing Agreement which, among other things, amended the interest rate and certain covenants in the 2019 Refinancing Agreement.

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Prior to its refinancing in February 2021, the 2019 Refinancing Agreement would have matured on April 12, 2022. Required amortization was $1.0 million per quarter and commenced with the fiscal quarter ending September 30, 2020. There was an unused line fee of 2.0% per annum on the undrawn portion of the 2019 Delayed Draw Term Loan, and there was a make-whole premium on prepayments made prior to the 19-month anniversary of the 2019 Refinancing Closing Date. This make-whole provision guaranteed that the Company would pay no less than 18 months’ applicable interest to the lenders under the 2019 Refinancing Agreement.

The interest rate on borrowings under the 2019 Refinancing Agreement was, at the option of LFS and its subsidiaries, either LIBOR (with a 2.00% floor) plus 11.00% or a base rate (with a 3.00% minimum) plus 10.00%. At the 2021 Refinancing Date, the interest rate in effect on the 2019 Refinancing Term Loan was 13.00%.

2019 Refinancing Agreement - CB Warrants

In connection with the 2019 Refinancing Agreement, on the 2019 Refinancing Closing Date, the Company issued to CB and the other lenders under the 2019 Refinancing Agreement warrants (the “CB Warrants”) to purchase up to a maximum of 263,314 shares of the Company's common stock at an exercise price of $7.63 per share subject to certain adjustments, including for stock dividends, stock splits or reclassifications. The actual number of shares of common stock into which the CB Warrants were exercisable at any given time were equal to: (i) the product of (x) the number of shares equal to 2% of the Company’s issued and outstanding shares of common stock on the 2019 Refinancing Closing Date on a fully diluted basis and (y) the percentage of the total 2019 Delayed Draw Term Loan made as of the exercise date, minus (ii) the number of shares previously issued under the CB Warrants. As of the 2019 Refinancing Closing Date through the 2021 Refinancing Date, no amounts had been drawn on the 2019 Delayed Draw Term Loan, so no portion of the CB Warrants were exercisable. The CB Warrants were to be exercised for cash or on a “cashless basis,” subject to certain adjustments, at any time after the 2019 Refinancing Closing Date until the expiration of such warrant at 5:00 p.m., New York time, on the earlier of (i) the five (5) year anniversary of the 2019 Refinancing Closing Date, or (ii) the liquidation of the Company.  

For the period from January 1, 2021 through the 2021 Refinancing Date, the Company recorded interest expense for the amortization of the CB Warrants liability and embedded derivative debt discounts of $0.1 million and recorded an additional $0.1 million of interest expense for the amortization of the debt issuance costs.

2019 ABL Credit Agreement

On the 2019 Refinancing Closing Date, LFS also entered into a financing agreement with the lenders thereto and Citizens Bank, N.A., as collateral agent, administrative agent and origination agent (the “2019 ABL Credit Agreement” and, together with the 2019 Refinancing Agreement, the “Refinancing Agreements”). The 2019 ABL Credit Agreement consisted of a $15.0 million revolving credit facility (the “2019 Revolving Credit Facility”). Proceeds of the 2019 Revolving Credit Facility were to be used for general corporate purposes. On the 2019 Refinancing Closing Date, the Company entered into an amendment to the 2019 ABL Credit Agreement (as amended, 2019 ABL Credit Amendment Number One and Waiver), which amended certain provisions under the 2019 ABL Credit Agreement.

The interest rate on borrowings under the 2019 ABL Credit Agreement was, at the option of LFS and its subsidiaries, either LIBOR (with a 2.0% floor) plus an applicable margin ranging from 3.00% to 3.50% or a base rate (with a 3.0% minimum) plus an applicable margin ranging from 2.00% to 2.50%. At the 2021 Refinancing Date, the interest rate in effect on the 2019 ABL Credit Agreement was 5.25%.

As of the 2021 Refinancing Date, the Company had irrevocable letters of credit in the amount of $3.4 million with its lender to secure obligations under its self-insurance program. Prior to its refinancing in February 2021, the 2019 ABL Agreement would have matured in April 2022.

Wintrust Term and Revolving Loans

On the 2021 Refinancing Date, LFS, LHLLC and the direct and indirect subsidiaries of LFS from time to time included as parties to the agreement (the “Wintrust Guarantors”) entered into a credit agreement (the “Wintrust Credit Agreement”) by and among the LFS, LHLLC, Wintrust Guarantors, the lenders party thereto from time to time, Wheaton Bank & Trust Company, N.A., a subsidiary of Wintrust Financial Corporation (collectively, “Wintrust”), as administrative agent and L/C issuer, Bank of the West as documentation agent, M&T Bank as syndication agent, and Wintrust as lead arranger and sole book runner.

In accordance with the terms of the Wintrust Credit Agreement, Lenders provided to LFS (i) a $30.0 million senior secured term loan (the “Wintrust Term Loan”); and (ii) a $25.0 million senior secured revolving credit facility with a $5.0 million sublimit for the issuance of letters of credit (the “Wintrust Revolving Loan” and, together with the Wintrust Term Loan, the “Wintrust Loans”). Proceeds of the Wintrust Loans were used to refinance certain existing indebtedness, finance working

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capital and other general corporate purposes and fund certain fees and expenses associated with the closing of the Wintrust Loans.

The Wintrust Revolving Loan bore interest, at LFS’s option, at either LIBOR (with a 0.25% floor) plus 3.5% or a base rate (with a 3.0% floor) plus 0.50%, subject to a 50 basis point step-down based on the ratio between the senior debt of the Company and its subsidiaries to the EBITDA (earnings before interest, income taxes, depreciation and amortization) of the LFS and its subsidiaries for the most recently ended four fiscal quarters. The Wintrust Term Loan bore interest, at LFS’s option, at either LIBOR (with a 0.25% floor) plus 4.0% or a base rate (with a 3.0% floor) plus 1.00%, subject to a 50 (for LIBOR) or 75 (for base rate) basis point step-down based on the Senior Leverage Ratio.

LFS was required to make principal payments on the Wintrust Term Loan in $0.5 million installments on the last business day of each month commencing on March 31, 2021 with a final payment of all principal and interest not sooner paid on the Wintrust Term Loan due and payable on February 24, 2026.

In conjunction with the Jake Marshall Transaction, the Company entered into an amendment to the Wintrust Credit Agreement (the “A&R Wintrust Credit Agreement”). In accordance with the terms of the A&R Credit Agreement, Lenders provided to LFS (i) a $35.5 million senior secured term loan (the “A&R Wintrust Term Loan”); and (ii) a $25 million senior secured revolving credit facility with a $5 million sublimit for the issuance of letters of credit (the “A&R Wintrust Revolving Loan” and, together with the Term Loan, the “A&R Wintrust Loans”). The overall Wintrust Term Loan commitment under the A&R Wintrust Credit Agreement was recast at $35.5 million in connection with the A&R Credit Agreement. A portion of the A&R Wintrust Term Loan commitment was used to fund the closing purchase price of the Jake Marshall Transaction. The A&R Credit Agreement was also amended to: (i) permit the Company to undertake the Jake Marshall Transaction (ii) make certain adjustments to the covenants under the A&R Credit Agreement (which were largely done to make certain adjustments for the Jake Marshall Transaction) (iii) allow for the Earnout Payments under the Jake Marshall Transaction and (iv) make other corresponding changes to the A&R Credit Agreement.

The A&R Wintrust Revolving Loan bears interest, at LFS’s option, at either Term SOFR (as defined in the A&R Credit Agreement) (with a 0.15% floor) plus 3.60%, 3.76% or 3.92% for a tenor of one month, three months or six months, respectively, or a base rate (as set forth in the A&R Credit Agreement) (with a 3.0% floor) plus 0.50%, subject to a 50 basis point step-down based on the ratio between the senior debt of the Company and its subsidiaries to the EBITDA of LFS and its subsidiaries for the most recently ended four fiscal quarters (the “Senior Leverage Ratio”). The A&R Wintrust Term Loan bears interest, at LFS’s option, at either Term SOFR (with a 0.15% floor) plus 4.10%, 4.26% or 4.42% for a tenor of one month, three months or six months, respectively, or a base rate (with a 3.0% floor) plus 1.00%, subject to a 50 (for Term SOFR) or 75 (for base rate) basis point step-down based on the Senior Leverage Ratio. At March 31, 2022, the interest rate in effect on the Wintrust Term Loan was 4.50%

LFS is required to make principal payments on the A&R Wintrust Term Loan in installments of approximately $0.6 million on the last business day of each month commencing on December 31, 2021. Subject to defaults and remedies under the A&R Credit Agreement, the final payment of all principal and interest not sooner paid on the A&R Wintrust Term Loan is due and payable on February 24, 2026. Subject to defaults and remedies under the A&R Credit Agreement, the A&R Wintrust Revolving Loan matures and becomes due and payable by LFS on February 24, 2026.

The A&R Wintrust Loans are secured by (i) a valid, perfected and enforceable lien of the administrative agent on the ownership interests held by each of LFS and Wintrust Guarantors in their respective subsidiaries; and (ii) a valid, perfected and enforceable lien of the administrative agent on each of LFS and Wintrust Guarantors’ personal property, fixtures and real estate, subject to certain exceptions and limitations. Additionally, the re-payment of the A&R Wintrust Loans shall be jointly and severally guaranteed by each Wintrust Guarantor.

The A&R Credit Agreement contains representations and warranties, covenants and events of default that are customary for facilities of this type, as more particularly described in the A&R Credit Agreement. The A&R Wintrust Loans also contain three financial maintenance covenants, including (i) a requirement to have as of the last day of each quarter for the senior leverage ratio of the Company and its subsidiaries not to exceed an amount beginning at 2.00 to 1.00 (ii) a fixed charge coverage ratio of not less than 1.20 to 1.00 as of the last day of each fiscal quarter commencing with the fiscal quarter ending December 31, 2021, and (iii) no unfinanced capital expenditures, except for unfinanced capital expenditures in the ordinary course of business not exceeding in the aggregate $4.0 million during any fiscal year; and no default or event of default (as defined by the agreement) has occurred and is continuing, 50% of any portion of this annual limit, if not expended in the fiscal year for which it is permitted, may be carried over for expenditure in the next following fiscal year as stipulated by the agreement. LFS and its affiliates maintain various commercial and service relationships with certain members of the syndicate and their affiliates in the ordinary course of business.

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As of March 31, 2022, the Company had $9.4 million of borrowings outstanding under the A&R Wintrust Revolving Loan. The Company did not have any borrowings outstanding under the A&R Wintrust Revolving Loan as of December 31, 2021. During the three months ended March 31, 2022, the maximum outstanding borrowings under the A&R Wintrust Revolving Loan at any time was $9.4 million and the average daily balance was approximately $0.1 million. For the three months ended March 31, 2022, the Company incurred interest on the A&R Wintrust Revolving Loan at a weighted average annual interest rate of 4.00%. For the three months ended March 31, 2022, commitment fees of approximately $14 thousand were paid to maintain credit availability under the A&R Wintrust Revolving Loan.

At March 31, 2022, the Company had irrevocable letters of credit in the amount of $3.3 million with the lenders under the A&R Wintrust Credit Agreement to secure obligations under its self-insurance program.

The following is a summary of the applicable margin and commitment fees payable on the available A&R Wintrust Term Loan and A&R Wintrust Revolving Loan credit commitment:

Level	Senior Leverage Ratio	Additional Margin for Prime Rate loans		Additional Margin for Prime Revolving loans		Additional Margin for Eurodollar Term loans
I	Greater than 1.00 to 1.00	1.00	%	0.50	%	0.25	%
II	Less than or equal to 1.00 to 1.00	0.25	%	—	%	0.25	%

As of March 31, 2022, the Company was in compliance with all financial maintenance covenants as required by the A&R Wintrust Loans.

Note 7 – Equity

The Company’s second amended and restated certificate of incorporation currently authorizes the issuance of 100,000,000 shares of common stock, par value $0.0001, and 1,000,000 shares of preferred stock, par value $0.0001.

Warrants

In conjunction with the Company's initial public offering, the Company issued Public Warrants, Private Warrants and $15 Exercise Price Sponsor Warrants. The Company issued certain Merger Warrants and Additional Merger Warrants in conjunction with the Company's business combination with LHLLC in July 2016 (the “Business Combination”). On July 20, 2021, the Public Warrants, Private Warrants, and Additional Merger Warrants expired by their terms.

The following table summarizes the underlying shares of common stock with respect to outstanding warrants:

	March 31, 2022	December 31, 2021
$15 Exercise Price Sponsor Warrants(1)(2)	600,000	600,000
Merger Warrants(3)(4)	629,643	629,643
Total	1,229,643	1,229,643

(1)    Exercisable for one share of common stock at an exercise price of $15.00 per share (“$15 Exercise Price Sponsor Warrants”).

(2)    Issued under a warrant agreement dated July 15, 2014, between Continental Stock Transfer and Trust Company, as warrant agent, and the Company.

(3)    Exercisable for one share of common stock at an exercise price of $12.50 per share (“Merger Warrants”).

(4)    Issued to the sellers of LHLLC.

Incentive Plan

Upon the consummation of the Company's Business Combination, the Company adopted an omnibus incentive plan (the “Omnibus Incentive Plan”) for which all future equity awards will be granted thereunder.

On March 9, 2021, the Board of Directors approved certain amendments to the Company's Omnibus Incentive Plan (the “2021 Amended and Restated Omnibus Incentive Plan”) to increase the number of shares of the Company's common stock that may be issued pursuant to awards by 600,000, for a total of 2,250,000 shares, and extended the term of the plan so that it will expire on the tenth anniversary of the date the stockholders approve the 2021 Amended and Restated Omnibus Incentive Plan. The amendments were approved by the Company's stockholders at the Annual Meeting held on June 16, 2021.

See Note 14 for a discussion of the Company's management incentive plans for restricted stock units (“RSUs”) granted, vested, forfeited and remaining unvested.

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Employee Stock Purchase Plan

Upon approval of the Company's stockholders on May 30, 2019, the Company adopted the Limbach Holdings, Inc. 2019 Employee Stock Purchase Plan (the “ESPP”). On January 1, 2020, the ESPP went into effect. The ESPP enables eligible employees, as defined by the ESPP, the right to purchase the Company's common stock through payroll deductions during consecutive subscription periods at a purchase price of 85% of the fair market value of a common share at the end of each offering period. Annual purchases by participants are limited to the number of whole shares that can be purchased by an amount equal to ten percent of the participant's compensation or $5,000, whichever is less. Each offering period of the ESPP lasts six months, commencing on January 1 and July 1 of each year. The amounts collected from participants during a subscription period are used on the exercise date to purchase full shares of common stock. Participants may withdraw from an offering before the exercise date and obtain a refund of amounts withheld through payroll deductions. Compensation cost, representing the 15% discount applied to the fair market value of common stock, is recognized on a straight-line basis over the six-month vesting period during which employees perform related services. Under the ESPP, 500,000 shares are authorized to be issued. In January 2022, the Company issued 12,898 shares of its common stock to participants in the ESPP who contributed to the plan during the offering period ending December 31, 2021. In January 2021, the Company issued a total of 8,928 shares of its common stock to participants in the ESPP who contributed to the plan during the offering period ending December 31, 2020. As of March 31, 2022, 431,209 shares remain available for future issuance under the ESPP.

2021 Public Offering

On February 10, 2021 the Company entered into an underwriting agreement (“Underwriting Agreement”) with Lake Street Capital Markets, LLC (“Underwriter”) relating to an underwritten public offering (the “2021 Public Offering”). On February 12, 2021, the Company sold to the Underwriter 1,783,500 shares of its Common Stock. The Underwriting Agreement provided for purchase and sale of the Shares by the company to the Underwriter at a price of $11.28 per share. The price to the public in the 2021 Public Offering was $12.00 per share. In addition, under the terms of the Underwriting Agreement, the Company granted the Underwriter a 30-day option to purchase up to an additional 267,525 shares of Common Stock to cover over-allotments, if any, on the same terms and conditions. The net proceeds to the Company from the 2021 Public Offering after deducting the underwriting discounts and commissions were approximately $19.8 million. On February 18, 2021, the Company received approximately $3.0 million of net proceeds for the sale of 267,525 shares in connection with the exercise of the over-allotment option.

Note 8 – Fair Value Measurements

The Company measures the fair value of financial assets and liabilities in accordance with ASC Topic 820 – Fair Value Measurements and Disclosures, which defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. ASC Topic 820 establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value and requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to measurements involving significant unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are as follows:

•Level 1 — inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that are accessible at the measurement date;

•Level 2 — inputs other than quoted prices included in Level 1 that are observable for the asset or liability either directly or indirectly such as quoted prices in active markets for similar assets and liabilities, quoted prices for identical or similar assets or liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of assets or liabilities; and

•Level 3 — unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions.

The Company believes that the carrying amounts of its financial instruments, including cash and cash equivalents, trade accounts receivable and accounts payable, consist primarily of instruments without extended maturities, which approximate fair value primarily due to their short-term maturities and low risk of counterparty default. The Company also believes that the carrying values of the A&R Wintrust Term Loan and the A&R Wintrust Revolving Loan approximate their respective fair values due to the variable rates on such debt. As of March 31, 2022, the Company determined that the fair value of the A&R Wintrust Term Loan was $33.0 million and the A&R Wintrust Revolving Loan was $9.4 million. Such fair value was determined using discounted estimated future cash flows using level 3 inputs.

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As a part of the total consideration for the Jake Marshall Transaction, the Company recognized $3.1 million in contingent consideration, of which the entire balance was included in other long-term liabilities in the Company’s condensed consolidated balance sheet as of March 31, 2022. The Company determined the initial fair value of the Earnout Payments based on the Monte Carlo Simulation method, which represented a Level 3 measurement. As of the Effective Date, the Earnout Payments associated with the Jake Marshall Transaction were valued utilizing a discount rate of 6.83%. The discount rate was calculated using the build-up method with a risk-free rate commensurate with the term of the Earnout Payments based on the U.S. Treasury Constant Maturity Yield. Subsequent to the Effective Date, the Earnout Payments are re-measured at fair value each reporting period. No changes in the estimated fair value of the contingent payments were recognized during the three months ended March 31, 2022.

Prior to its termination as a result of the 2021 Refinancing, the Company's CB Warrants were determined using the Black-Scholes-Merton option pricing model. The valuation inputs included the quoted price of the Company’s common stock in an active market, volatility and expected life of the warrants, which were considered Level 3 inputs. The CB Warrants liability was included in other long-term liabilities on the Company's Condensed Consolidated Balance Sheets. The Company remeasured the fair value of the CB Warrants liability as of February 24, 2021 and recorded any adjustments to other income (expense). At February 24, 2021, the CB Warrants liability was $2.0 million. Due to the extinguishment of the CB Warrants on the 2021 Refinancing Date, there was no liability associated with the CB Warrants recorded as of March 31, 2021. For the period from January 1, 2021 through the 2021 Refinancing Date, the Company recorded other income of $14 thousand to reflect the change in the CB Warrants liability.

Note 9 – Earnings per Share

Earnings per Share

The Company calculates earnings per share in accordance with ASC Topic 260 - Earnings Per Share (“EPS”). Basic earnings per common share applicable to common stockholders is computed by dividing earnings applicable to common stockholders by the weighted-average number of common shares outstanding and assumed to be outstanding. Diluted EPS assumes the dilutive effect of outstanding common stock warrants, shares issued in conjunction with the Company’s ESPP and RSUs, all using the treasury stock method.

The following table sets forth the computation of the basic and diluted earnings per share attributable to the Company's common shareholders for the three months ended March 31, 2022 and 2021:

	Three Months Ended March 31,
(in thousands, except per share amounts)	2022		2021
EPS numerator:
Net loss	$	(1,516)	$	(2,282)
EPS denominator:
Weighted average shares outstanding – basic	10,421		9,218
Impact of dilutive securities(1)	—		—
Weighted average shares outstanding – diluted	10,421		9,218
EPS:
Basic	$	(0.15)	$	(0.25)
Diluted	$	(0.15)	$	(0.25)

(1)    For the three months ended March 31, 2022 and 2021, the Company excluded 153,741 and 603,847, respectively, of weighted average anti-dilutive securities related to certain of the Company's outstanding common stock warrants, shares issued in conjunction with the Company's ESPP and nonvested RSUs.

The following table summarizes the securities that were antidilutive or out-of-the-money, and therefore, were not included in the computations of diluted income per common share:

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	Three Months Ended March 31,
	2022	2021
In-the-money warrants	—	365,556
Out-of-the-money warrants (see Note 7)	1,229,643	600,000
Service-based RSUs (See Note 14)	70,999	143,647
Performance and market-based RSUs(1)	87,053	90,729
Employee Stock Purchase Plan	3,547	3,627
Total	1,391,242	1,203,559

(1)    For the three months ended March 31, 2022 and 2021, certain PRSU and MRSU awards (each defined in Note 14) were not included in the computation of diluted income per common share because the performance and market conditions were not satisfied during the periods and would not be satisfied if the reporting date was at the end of the contingency period.

Note 10 – Income Taxes

The Company is taxed as a C corporation.

For interim periods, the provision for income taxes (including federal, state, local and foreign taxes) is calculated based on the estimated annual effective tax rate, adjusted for certain discrete items for the full fiscal year. Cumulative adjustments to the Company's estimate are recorded in the interim period in which a change in the estimated annual effective rate is determined. Each quarter the Company updates its estimate of the annual effective tax rate, and if its estimated tax rate changes, the Company makes a cumulative adjustment.

The Company had an effective tax benefit rate of 28.9% and 31.2% for the three months ended March 31, 2022 and 2021, respectively. The decrease in the effective tax benefit rate was the result of certain discrete tax items. During the three months ended March 31, 2022 and 2021, the Company recorded discrete tax items of approximately $0.1 million and $0.2 million, respectively, related to excess tax benefits associated with stock based compensation.

No valuation allowance was required as of March 31, 2022 or December 31, 2021.

Note 11 – Operating Segments

As discussed in Note 1, the Company operates in two segments, (i) GCR, in which the Company generally manages new construction or renovation projects that involve primarily HVAC, plumbing, or electrical services awarded to the Company by general contractors or construction managers, and (ii) ODR, in which the Company provides maintenance or service primarily on HVAC, plumbing or electrical systems, building controls and specialty contracting projects direct to, or assigned by, building owners or property managers. These segments are reflective of how the Company’s Chief Operating Decision Maker (“CODM”) reviews operating results for the purposes of allocating resources and assessing performance. The Company's CODM is comprised of its Chief Executive Officer, Chief Financial Officer and Chief Operating Officer.

The CODM evaluates performance based on income from operations of the respective branches after the allocation of Corporate office operating expenses. In accordance with ASC Topic 280 – Segment Reporting, the Company has elected to aggregate all of the construction branches into one GCR reportable segment and all of the service branches into one ODR reportable segment. All transactions between segments are eliminated in consolidation. The Company's corporate department provides general and administrative support services to its two operating segments. The CODM allocates costs between segments for selling, general and administrative expenses and depreciation expense.

All of the Company’s identifiable assets are located in the United States, which is where the Company is domiciled. Interest expense is not allocated to segments because of the corporate management of debt service including interest.

Condensed consolidated segment information for the three months ended March 31, 2022 and 2021 were as follows:

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	Three months ended March 31,
(in thousands)	2022		2021
Statement of Operations Data:
Revenue:
GCR	$	71,932	$	84,804
ODR	42,890		28,540
Total revenue	114,822		113,344
Gross profit:
GCR	8,358		9,395
ODR	9,982		7,834
Total gross profit	18,340		17,229
Selling, general and administrative:
GCR	8,565		9,114
ODR	9,570		7,354
Corporate	599		677
Total selling, general and administrative	18,734		17,145
Amortization of intangibles	399		104
Operating loss	$	(793)	$	(20)
Less unallocated amounts:
Interest expense, net	(486)		(1,264)
Loss on disposition of property and equipment	(36)		(86)
Loss on early termination of operating lease	(817)		—
Loss on early debt extinguishment	—		(1,961)
Gain on change in fair value of warrant liability	—		14
Total unallocated amounts	(1,339)		(3,297)
Loss before income taxes	$	(2,132)	$	(3,317)
Other Data:
Depreciation and amortization:
GCR	$	1,108	$	1,036
ODR	555		355
Corporate	399		104
Total other data	$	2,062	$	1,495

The Company does not identify capital expenditures and total assets by segment in its internal financial reports due in part to the shared use of a centralized fleet of vehicles and specialized equipment. Interest expense is also not allocated to segments because of the Company’s corporate management of debt service, including interest.

Note 12 - Leases

The Company leases real estate, trucks and other equipment. The determination of whether an arrangement is, or contains, a lease is performed at the inception of the arrangement. Classification and initial measurement of the right-of-use asset and lease liability are determined at the lease commencement date. The Company elected the short-term lease measurement and recognition exemption; therefore, leases with an initial term of 12 months or less are not recorded on the condensed consolidated balance sheets. Instead, the short-term leases are recognized in expense on a straight-line basis over the lease term.

The Company's arrangements include certain non-lease components such as common area and other maintenance for leased real estate, as well as mileage, fuel and maintenance costs related to leased vehicles. For all leased asset classes, the Company has elected to not separate non-lease components from lease components and will account for each separate lease component and

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non-lease component associated with the lease as a single lease component. The Company does not guarantee any residual value in its lease agreements, and there are no material restrictions or covenants imposed by lease arrangements. Real estate leases typically include one or more options to extend the lease. The Company regularly evaluates the renewal options, and when they are reasonably certain of exercise, the Company includes the renewal period in its lease term. For the Company's leased vehicles, the Company uses the interest rate implicit in its leases with the lessor to discount lease payments at the lease commencement date. When the implicit rate is not readily available, as is the case with the Company's real estate leases, the Company uses quoted borrowing rates on its secured debt.

Related Party Lease Agreement. In conjunction with the closing of the Jake Marshall Transaction, the Company entered into an operating lease for certain land and facilities owned by a former member of JMLLC who became a full-time employee of the Company. The lease term is 10 years and includes an option to extend the lease for two successive periods of 2 years each through November 2035. Base rent for the term of the lease is $37,500 per month for the first five years with payment commencing on January 1, 2022. The fixed rent payment is escalated to $45,000 per month for years 6 through 10 of the lease term. Fixed rent payments for the extension term shall be increased from $45,000 by the percentage increase, if any, in the consumer price index from the lease commencement date. In addition, under the agreement, the Company is required to pay its share of estimated property taxes and operating expenses, both of which are variable lease expenses.

Southern California Sublease. In June, 2021, the Company entered into a sublease agreement with a third party for the entire ground floor of its leased space in Southern California, consisting of 71,787 square feet. Under the terms of the sublease agreement, the sublessee is obligated to pay the Company base rent of approximately $0.6 million per year, which is subject to a 3.0% annual rent increase, plus certain operating expenses and other costs. The initial lease term commenced in September 2021 and continues through April 30, 2027. As of March 31, 2022, the Company remains obligated under the original lease for such office space and, in the event the subtenant of such office space fails to satisfy its obligations under the sublease, the Company would be required to satisfy its obligations directly to the landlord under such original lease.

In addition, during the first quarter of 2022, the Company entered into an amendment to the aforementioned sublease agreement, which, among other things, expanded the sublease premises to include the entire second floor of its leased space in Southern California, consisting of 16,720 square feet. Under the terms of the amended sublease agreement, the sublessee is obligated to pay the Company base rent of approximately $0.8 million per year, which is subject to a 3.0% annual rent increase, plus certain operating expenses and other costs. The amended sublease term commenced in March 2022 and continues through April 30, 2027. For the three months ended March 31, 2022, the Company recorded approximately $0.2 million of income in selling, general and administrative expenses related to this sublease agreement.

Pittsburgh Lease Termination. In March, 2022, the Company entered into a lease termination agreement (the “Lease Termination Agreement”) to terminate, effective March 31, 2022, the lease associated with the Company’s office space located in Pittsburgh, Pennsylvania, which previously served as its corporate headquarters. Absent the Lease Termination Agreement, the lease would have expired in accordance with its terms in July 2025. Pursuant to the Lease Termination Agreement, in exchange for allowing the Company to terminate the lease early, the Company agreed to pay a termination fee in the aggregate of approximately $0.7 million in 16 equal monthly installments commencing on April 1, 2022.

In connection with the lease termination, the Company recognized a gain of $0.1 million associated with the derecognition of the operating lease right-of-use asset and corresponding operating lease liabilities associated with the operating lease and recorded a $0.1 million loss on the disposal of leasehold improvements.

The following table summarizes the lease amounts included in the Company's condensed consolidated balance sheets:

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(in thousands)	Classification on the Condensed Consolidated Balance Sheets	March 31, 2022		December 31, 2021
Assets
Operating	Operating lease right-of-use assets(1)	$	17,719	$	20,119
Finance	Property and equipment, net(2)	5,111		4,916
Total lease assets		$	22,830	$	25,035
Liabilities
Current
Operating	Current operating lease liabilities	$	3,762	$	4,366
Finance	Current portion of long-term debt	2,458		2,451
Noncurrent
Operating	Long-term operating lease liabilities	14,787		16,576
Finance	Long-term debt	2,859		2,681
Total lease liabilities		$	23,866	$	26,074

(1)     Operating lease assets are recorded net of accumulated amortization of $15.6 million at March 31, 2022 and $15.9 million at December 31, 2021.

(2)    Finance lease assets are recorded net of accumulated amortization of $6.4 million at March 31, 2022 and $5.9 million at December 31, 2021.

The following table summarizes the lease costs included in the Company's condensed consolidated statements of operations for the three months ended March 31, 2022 and 2021:

		Three Months Ended March 31,
(in thousands)	Classification on the Condensed Consolidated Statement of Operations	2022		2021
Operating lease cost	Cost of revenue(1)	$	694	$	690
Operating lease cost	Selling, general and administrative(1)	704		584
Finance lease cost
Amortization	Cost of revenue(2)	651		674
Interest	Interest expense, net(2)	66		86
Total lease cost		$	2,115	$	2,034

(1)    Operating lease costs recorded in cost of revenue included $0.1 million of variable lease costs for both the three months ended March 31, 2022 and 2021. In addition, $0.1 million of variable lease costs are included in selling, general and administrative for both the three months ended March 31, 2022 and 2021. These variable costs consist of the Company's proportionate share of operating expenses, real estate taxes and utilities.

(2)     Finance lease costs recorded in cost of revenue include variable lease costs of $0.8 million for the three months ended March 31, 2022 and $0.6 million for the three months ended March 31, 2021. These variable lease costs consist of fuel, maintenance, and sales tax charges.

Future minimum commitments for finance and operating leases that have non-cancelable lease terms in excess of one year as of March 31, 2022 were as follows:

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			Operating Leases
Year ending (in thousands):	Finance Leases		Non-Related Party		Related Party(1)		Sublease Receipts(2)		Total Operating
Remainder of 2022	$	1,934	$	3,252	$	338	$	(623)	$	2,967
2023	1,758		3,108		450		(885)		2,673
2024	1,026		2,502		450		(912)		2,040
2025	500		2,148		450		(939)		1,659
2026	99		2,010		450		(967)		1,493
Thereafter	—		2,033		4,815		(327)		6,521
Total minimum lease payments	$	5,317	$	15,053	$	6,953	$	(4,653)	$	17,353
Amounts representing interest	358
Present value of net minimum lease payments	$	5,675

(1)    Associated with the aforementioned related party lease entered into with a former member of JMLLC.

(2)    Associated with the aforementioned third party sublease.

The following is a summary of the lease terms and discount rates:

	March 31, 2022		December 31, 2021
Weighted average lease term (in years):
Operating	7.30		7.10
Finance	2.60		2.51
Weighted average discount rate:
Operating	4.67	%	4.68	%
Finance	5.14	%	5.27	%

The following is a summary of other information and supplemental cash flow information related to finance and operating leases:

	Three months ended March 31,
(in thousands)	2022		2021
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	1,358	$	1,225
Operating cash flows from finance leases	66		86
Financing cash flows from finance leases	660		667
Right-of-use assets exchanged for lease liabilities:
Operating leases	—		156
Finance leases	864		87
Right-of-use assets disposed or adjusted modifying operating leases liabilities	(1,276)		36
Right-of-use assets disposed or adjusted modifying finance leases liabilities	$	(19)	—

Note 13 – Commitments and Contingencies

Legal. The Company is continually engaged in administrative proceedings, arbitrations, and litigation with owners, general contractors, suppliers, and other unrelated parties, all arising in the ordinary courses of business. The ultimate resolution of these contingencies could, individually or in the aggregate, be material to the condensed consolidated financial statements. In the opinion of the Company’s management, the current belief is that the results of these actions will not have a material adverse effect on the financial position, results of operations, or cash flows of the Company.

On January 23, 2020, plaintiff, Bernards Bros. Inc. (“Bernards”), filed a complaint against the Company in Superior Court of the State of California for the County of Los Angeles. The complaint alleges that the Company's Southern California operations refused to honor a proposal made to Bernards to act as a subcontractor on a construction project, and that, as a result of the

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wrongful failure to honor the proposal, Bernards suffered damages in excess of $3.0 million, including alleged increased costs for hiring a different subcontractor to perform the work. The Company is vigorously defending the suit. A non-binding mediation took place on August 19, 2021 that did not result in a settlement. Per the agreement of the Company and Bernards, in January 2022, the Court appointed a private referee to manage the case and adjudicate the dispute. A trial date before the private referee is pending scheduling. The Company believes that a loss is neither probable nor reasonably estimable for this matter, and, as such, has not recorded a loss contingency.

On April 17, 2020, plaintiff, LA Excavating, Inc., filed a complaint against the Company's wholly-owned subsidiary, Limbach Company LP, and several other parties, in Superior Court of the State of California, for the County of Los Angeles. The complaint seeks damages of approximately $1.0 million for alleged failure to pay contract balances and extra work ordered by Limbach Company LP, as well as seeks to enforce payment obligations under a payment bond. The Company disputes the allegations and intends to vigorously defend the suit, which is currently set for mediation on May 11, 2022 and trial beginning on February 7, 2023. The Company believes that a loss is neither probable nor reasonably estimable for this matter, and, as such, has not recorded a loss contingency.

On January 26, 2022, claimant, Suffolk Construction Company, Inc. (“Suffolk”) filed a Demand for Arbitration in Massachusetts against Boston Medical Center Corporation (“BMC”) and numerous of Suffolk’s trade subcontractors, including, the Company’s wholly-owned subsidiary, Limbach Company LLC, seeking to recover monies BMC withheld from Suffolk and its subcontractors based on an audit of project billings. Suffolk has demanded the Company defend and indemnify Suffolk against BMC’s audit findings that the Company overbilled the project just over $0.3 million and for the Company’s share of BMC’s audit costs, which share has not been, and cannot currently be, quantified. The Company disputes the findings of BMC’s audit and intends to vigorously defend the allegation that it overbilled the project. A final arbitration hearing has not been scheduled. The Company believes that a loss is neither probable nor reasonably estimable for this matter, and, as such, has not recorded a loss contingency.

Surety. The terms of its construction contracts frequently require that the Company obtain from surety companies, and provide to its customers, payment and performance bonds (“Surety Bonds”) as a condition to the award of such contracts. The Surety Bonds secure its payment and performance obligations under such contracts, and the Company has agreed to indemnify the surety companies for amounts, if any, paid by them in respect of Surety Bonds issued on its behalf. In addition, at the request of labor unions representing certain of the Company's employees, Surety Bonds are sometimes provided to secure obligations for wages and benefits payable to or for such employees. Public sector contracts require Surety Bonds more frequently than private sector contracts, and accordingly, the Company's bonding requirements typically increase as the amount of public sector work increases. As of March 31, 2022, the Company had approximately $134.9 million in surety bonds outstanding. The Surety Bonds are issued by surety companies in return for premiums, which vary depending on the size and type of bond.

Collective Bargaining Agreements. Many of the Company’s craft labor employees are covered by collective bargaining agreements. The agreements require the Company to pay specified wages, provide certain benefits and contribute certain amounts to multi-employer pension plans. If the Company withdraws from any of the multi-employer pension plans or if the plans were to otherwise become underfunded, the Company could incur additional liabilities related to these plans. Although the Company has been informed that some of the multi-employer pension plans to which it contributes have been classified as “critical” status, the Company is not currently aware of any significant liabilities related to this issue.

Self-insurance. The Company is substantially self-insured for workers’ compensation and general liability claims, in the view of the relatively high per-incident deductibles the Company absorbs under its insurance arrangements for these risks. The Company purchases workers’ compensation and general liability insurance under policies with per-incident deductibles of $250,000 per occurrence and a $4.4 million maximum aggregate deductible loss limit per year. Losses incurred over primary policy limits are covered by umbrella and excess policies up to specified limits with multiple excess insurers. The Company accrues for the unfunded portion of costs for both reported claims and claims incurred but not reported. The liability for unfunded reported claims and future claims is reflected on the consolidated balance sheets as current and non-current liabilities. The liability is determined by determining a reserve for each reported claim on a case-by-case basis based on the nature of the claim and historical loss experience for similar claims plus an allowance for the cost of incurred but not reported claims. The current portion of the liability is included in accrued expenses and other current liabilities on the consolidated balance sheet. The non-current portion of the liability is included in other long-term liabilities on the consolidated balance sheet.

The Company is self-insured related to medical and dental claims under policies with annual per-claimant and annual aggregate stop-loss limits. The Company accrues for the unfunded portion of costs for both reported claims and claims incurred but not reported. The liability for unfunded reported claims and future claims is reflected on the consolidated balance sheets as a current liability in accrued expenses and other current liabilities.

The components of the self-insurance liability as of March 31, 2022 and December 31, 2021 are as follows:

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(in thousands)	March 31, 2022		December 31, 2021
Current liability — workers’ compensation and general liability	$	173	$	184
Current liability — medical and dental	373		456
Non-current liability	447		451
Total liability	$	993	$	1,091
Restricted cash	$	113	$	113

The restricted cash balance represents an imprest cash balance set aside for the funding of workers' compensation and general liability insurance claims. This amount is replenished either when depleted or at the beginning of each month.

Note 14 – Management Incentive Plans

The Company initially adopted the Omnibus Incentive Plan on July 20, 2016 for the purpose of: (a) encouraging the profitability and growth of the Company through short-term and long-term incentives that are consistent with the Company’s objectives; (b) giving participants an incentive for excellence in individual performance; (c) promoting teamwork among participants; and (d) giving the Company a significant advantage in attracting and retaining key employees, directors and consultants. To accomplish such purposes, the Omnibus Incentive Plan, and such subsequent amendments to the Omnibus Incentive Plan, provides that the Company may grant options, stock appreciation rights, restricted shares, RSUs, performance-based awards (including performance-based restricted shares and restricted stock units), other share based awards, other cash-based awards or any combination of the foregoing.

Following the approval of the 2021 Amended and Restated Omnibus Incentive Plan, the Company has reserved 2,250,000 shares of its common stock for issuance. The number of shares issued or reserved pursuant to the Omnibus Incentive Plan will be adjusted by the plan administrator, as they deem appropriate and equitable, as a result of stock splits, stock dividends, and similar changes in the Company’s common stock. In connection with the grant of an award, the plan administrator may provide for the treatment of such award in the event of a change in control. All awards are made in the form of shares only.

Service-Based Awards

The Company grants service-based stock awards in the form of RSUs. Service-based RSUs granted to executives, employees, and non-employee directors vest ratably, on an annual basis, over three years and in the case of certain awards to non-employee directors, one year. The grant date fair value of the service-based awards was equal to the closing market price of the Company’s common stock on the date of grant.

The following table summarizes the Company's service-based RSU activity for the three months ended March 31, 2022:

	Awards	Weighted-Average Grant Date Fair Value
Unvested at December 31, 2021	266,089	$	8.45
Granted	180,739	9.00
Vested	(120,401)	7.43
Forfeited	(10,958)	9.29
Unvested at March 31, 2022	315,469	$	9.13

Performance-Based Awards

The Company grants performance-based restricted stock units (“PRSUs”) under which shares of the Company’s common stock may be earned based on the Company’s performance compared to defined metrics. The number of shares earned under a performance award may vary from zero to 150% of the target shares awarded, based upon the Company’s performance compared to the metrics. The metrics used for the grant are determined by the Company’s Compensation Committee of the Board of Directors and are based on internal measures such as the achievement of certain predetermined adjusted EBITDA, EPS growth and EBITDA margin performance goals over a three year period.

The Company recognizes stock-based compensation expense for these awards over the vesting period based on the projected probability of achievement of the performance conditions as of the end of each reporting period during the performance period and may periodically adjust the recognition of such expense, as necessary, in response to any changes in the Company’s

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forecasts with respect to the performance conditions. For both the three months ended March 31, 2022 and 2021, the Company recognized $0.2 million of stock-based compensation expense related to outstanding PRSUs.

The following table summarizes the Company's PRSU activity for the three months ended March 31, 2022:

	Awards	Weighted-Average Grant Date Fair Value
Unvested at December 31, 2021	280,700	$	9.46
Granted	249,885	7.17
Vested	—	—
Forfeited	(6,500)	9.04
Unvested at March 31, 2022	524,085	$	8.38

Market-Based Awards

The following table summarizes the Company's market-based RSU (“MRSUs”) activity for the three months ended March 31, 2022:

	Awards	Weighted-Average Grant Date Fair Value
Unvested at December 31, 2021	102,500	$	8.26
Granted	—	—
Vested	—	—
Forfeited	—	—
Unvested at March 31, 2022	102,500	$	8.26

The vesting of the MRSUs is contingent upon the Company’s closing price of a share of the Company's common stock on the Nasdaq Capital market, or such other applicable principal securities exchange or quotation system, achieving at least $18.00 over a period of eighty (80) consecutive trading days during the three-year period commencing on August 1, 2018 and concluding on July 31, 2021. On September 4, 2020, the Compensation Committee of the Board of Directors of the Company approved an amendment to extend the measurement period to July 16, 2022.

Total recognized stock-based compensation expense amounted to $0.6 million and $0.7 million for the three months ended March 31, 2022 and 2021, respectively. The aggregate fair value as of the vest date of RSUs that vested during the three months ended March 31, 2022 and 2021 was $1.1 million and $1.3 million, respectively. Total unrecognized stock-based compensation expense related to unvested RSUs which are probable of vesting was $5.0 million at March 31, 2022. These costs are expected to be recognized over a weighted average period of 1.97 years.

Note 15 – Subsequent Events

On May 5, 2022, the Company, LFS and LHLLC entered into a first amendment and waiver to the A&R Wintrust Credit Agreement (the “First Amendment to the A&R Wintrust Credit Agreement”) with the lenders party thereto and Wintrust, as administrative agent. The First Amendment to the A&R Wintrust Credit Agreement modifies certain definitions within the A&R Wintrust Credit Agreement, and make other corresponding changes, including: (i) the definition of EBITDA to allow for the recognition of certain restructuring charges and lease breakage costs not previously specified, (ii) the definition of Excess Cash Flow to exclude the aggregate amount of the Earnout Payments paid in cash, (iii) the definition of Total Funded Debt to exclude certain capitalized lease obligations for real estate based on the approval of each lender and (iv) the definition of Disposition to include a clause for the sale and leaseback of certain real property based on the approval of each lender.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion should be read in conjunction with the condensed consolidated financial statements and related notes thereto included elsewhere in this Quarterly Report on Form 10-Q. In addition to historical information, this discussion contains forward-looking statements that involve risks, uncertainties and assumptions that could cause actual results to differ materially from our management’s expectations. Factors that could cause such differences are discussed in “Forward-Looking Statements” and “Risk Factors” in our Annual Report on Form 10-K for the fiscal year ended December 31, 2021 and in subsequent Quarterly Reports on Form 10-Q. See “Item 1A. Risk Factors” in this Form 10-Q for certain periodic updates to the Company's risk factors. We assume no obligation to update any of these forward-looking statements.

Unless the context otherwise requires, a reference to a “Note” herein refers to the accompanying Notes to Condensed Consolidated Financial Statements (Unaudited) contained in Part I, "Item 1. Financial Statements."

Overview

The Company is an integrated building systems solutions firm whose expertise is in the design, modular prefabrication, installation, management and maintenance of HVAC, mechanical, electrical, plumbing and control systems for commercial, institutional and light industrial markets. The Company operates primarily in the Northeast, Mid-Atlantic, Southeast, Midwest, and Southwestern regions of the United States.

The Company’s market sectors primarily include the following:

•Healthcare, including research, acute care and inpatient hospitals for regional and national hospital groups, and pharmaceutical and biotech laboratories and manufacturing facilities;

•Education, including both public and private colleges, universities, research centers and K-12 facilities;

•Sports and entertainment, including sports arenas, entertainment facilities (including casinos) and amusement rides;

•Infrastructure, including passenger terminals and maintenance facilities for rail and airports;

•Government, including various facilities for federal, state and local agencies;

•Hospitality, including hotels and resorts;

•Commercial, including office building, warehouse and distribution centers and other commercial structures;

•Mission critical facilities, including data centers; and

•Industrial manufacturing facilities, including indoor grow farms and automotive, energy and general manufacturing plants.

The Company operates in two segments, (i) GCR, in which the Company generally manages new construction or renovation projects that involve primarily HVAC, plumbing, or electrical services awarded to the Company by general contractors or construction managers, and (ii) ODR, in which the Company provides maintenance or service primarily on HVAC, plumbing or electrical systems, building controls and specialty contracting projects direct to, or assigned by, building owners or property managers. This work is primarily performed under fixed price, modified fixed price, and time and material contracts over periods of typically less than two years.

Key Components of Condensed Consolidated Statements of Operations

Revenue

The Company generates revenue principally from fixed-price construction contracts to deliver HVAC, plumbing, and electrical construction services to its customers. The duration of the Company's contracts generally ranges from six months to two years. Revenue from fixed price contracts is recognized on the cost-to-cost method, measured by the relationship of total cost incurred to total estimated contract costs. Revenue from time and materials service contracts is recognized as services are performed. The Company believes that its extensive experience in HVAC, plumbing, and electrical projects, and its internal cost review procedures during the bidding process, enable it to reasonably estimate costs and mitigate the risk of cost overruns on fixed price contracts.

The Company generally invoices customers on a monthly basis based on a schedule of values that breaks down the contract amount into discrete billing items. Costs and estimated earnings in excess of billings are recorded as a contract asset until

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billable under the contract terms. Billings in excess of costs and estimated earnings are recorded as a contract liability until the related revenue is recognizable.

Cost of Revenue

Cost of revenue primarily consists of the labor, equipment, material, subcontract, and other job costs in connection with fulfilling the terms of our contracts. Labor costs consist of wages plus taxes, fringe benefits, and insurance. Equipment costs consist of the ownership and operating costs of company-owned assets, in addition to outside-rented equipment. If applicable, job costs include estimated contract losses to be incurred in future periods. Due to the varied nature of the Company's services, and the risks associated therewith, contract costs as a percentage of contract revenue have historically fluctuated and it expects this fluctuation to continue in future periods.

Selling, General and Administrative

Selling, general and administrative (“SG&A”) expenses consist primarily of personnel costs for its administrative, estimating, human resources, safety, information technology, legal, finance and accounting employees and executives. Also included are non-personnel costs, such as travel-related expenses, legal and other professional fees and other corporate expenses to support the growth of the Company's business and to meet the compliance requirements associated with operating as a public company. Those costs include accounting, human resources, information technology, legal personnel, additional consulting, legal and audit fees, insurance costs, board of directors’ compensation and the costs of achieving and maintaining compliance with Section 404 of the Sarbanes-Oxley Act of 2002.

Amortization of Intangibles

Amortization expense represents periodic non-cash charges that consist of amortization of various intangible assets primarily including favorable leasehold interests and certain customer relationships in the ODR segment. As a result of the Jake Marshall Transaction, the Company recognized, in the aggregate, an additional $5.7 million of intangible assets associated with customer relationships with third-party customers, the acquired trade name and acquired backlog. The Jake Marshall-related intangible assets were recorded under the acquisition method of accounting at their estimated fair values at the acquisition date.

Other (Expenses) Income

Other (expenses) income consists primarily of interest expense incurred in connection with the Company's debt, net of interest income, a loss associated with the early termination of an operating lease, a loss on early debt extinguishment, losses associated with the disposition of property and equipment and changes in fair value of warrant liability. Deferred financing costs are amortized to interest expense using the effective interest method.

Provision for Income Taxes

The Company is taxed as a C corporation and its financial results include the effects of federal income taxes which will be paid at the parent level.

For interim periods, the provision for income taxes (including federal, state and local taxes) is calculated based on the estimated annual effective tax rate. The Company accounts for income taxes in accordance with ASC Topic 740 – Income Taxes, which requires the use of the asset and liability method. Under this method, deferred tax assets and liabilities and income or expense are recognized for the expected future tax consequences of temporary differences between the financial statement carrying values and their respective tax bases, using enacted tax rates expected to be applicable in the years in which the temporary differences are expected to reverse. Changes in deferred tax assets and liabilities are recorded in the provision for income taxes.

Operating Segments

The Company manages and measures the performance of its business in two operating segments: GCR and ODR. These segments are reflective of how the Company’s CODM reviews operating results for the purposes of allocating resources and assessing performance. The Company's CODM is comprised of its Chief Executive Officer, Chief Financial Officer and Chief Operating Officer.

The CODM evaluates performance based on income from operations of the respective branches after the allocation of corporate office operating expenses. In accordance with ASC Topic 280 – Segment Reporting, the Company has elected to aggregate all of the GCR work performed at branches into one GCR reportable segment and all of the ODR work performed at branches into one ODR reportable segment. All transactions between segments are eliminated in consolidation. The Company's corporate department provides general and administrative support services to its two operating segments. The Company allocates costs

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between segments for selling, general and administrative and depreciation expense. Interest expense is not allocated to segments because of the corporate management of debt service. See Note 11 for further discussion on the Company's operating segments.

Comparison of Results of Operations for the three months ended March 31, 2022 and 2021

The following table presents operating results for the three months ended March 31, 2022 and 2021 in dollars and expressed as a percentage of total revenue (except as indicated below), as compared below:

	Three Months Ended March 31,
	2022					2021
(in thousands except for percentages)
Statement of Operations Data:
Revenue:
GCR	$	71,932	62.6	%		$	84,804	74.8	%
ODR	42,890		37.4	%		28,540		25.2	%
Total revenue	114,822		100.0	%		113,344		100.0	%
Gross profit:
GCR	8,358		11.6	%	(1)	9,395		11.1	%	(1)
ODR	9,982		23.3	%	(2)	7,834		27.4	%	(2)
Total gross profit	18,340		16.0	%		17,229		15.2	%
Selling, general and administrative:
GCR	8,565		11.9	%	(1)	9,114		10.7	%	(1)
ODR	9,570		22.3	%	(2)	7,354		25.8	%	(2)
Corporate	599		0.5	%		677		0.6	%
Total selling, general and administrative	18,734		16.3	%		17,145		15.1	%
Amortization of intangibles (Corporate)	399		0.3	%		104		0.1	%
Operating (loss) income:
GCR	(207)		(0.3)	%	(1)	281		0.3	%	(1)
ODR	412		1.0	%	(2)	480		1.7	%	(2)
Corporate	(998)		(0.9)	%		(781)		(0.7)	%
Total operating loss	(793)		(0.7)	%		(20)		—	%
Other expenses (Corporate)	(1,339)		(1.2)	%		(3,297)		(2.9)	%
Total consolidated loss before income taxes	(2,132)		(1.9)	%		(3,317)		(2.9)	%
Income tax benefit	(616)		(0.5)	%		(1,035)		(0.9)	%
Net loss	$	(1,516)	(1.3)	%		$	(2,282)	(2.0)	%

(1)As a percentage of GCR revenue.

(2)As a percentage of ODR revenue.

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Revenue

	Three Months Ended March 31,
	2022		2021		Increase/(Decrease)
(in thousands except for percentages)
Revenue:
GCR	$	71,932	$	84,804	$	(12,872)	(15.2)	%
ODR	42,890		28,540		14,350		50.3	%
Total revenue	$	114,822	$	113,344	$	1,478	1.3	%

Revenue for the three months ended March 31, 2022 increased by $1.5 million compared to the three months ended March 31, 2021. GCR revenue decreased by $12.9 million, or 15.2%, while ODR revenue increased by $14.4 million, or 50.3%. The decrease in period over period GCR segment revenue was primarily due to revenue declines in the Michigan, Mid-Atlantic and Southern California operating regions. The Company continued to focus on improving project execution and profitability by pursuing GCR opportunities that were smaller in size, shorter in duration, and where the Company can leverage its captive design and engineering services. In addition, in February 2022, the Company announced its strategic decision to wind down its Southern California operations. The Company expects to fully exit the Southern California Region in 2022. The increase in period over period ODR segment revenue was primarily due to the Company's continued focus on the accelerated growth of its ODR business. For the three months ended March 31, 2022, GCR and ODR segment revenue increased by $4.5 million and $7.2 million, respectively, as a result of revenue generated by the Acquired Entities in the Jake Marshall Transaction. See Note 3 for further information on the Jake Marshall Transaction.

In addition, during the first quarter of 2022, the Company was impacted by supply chain issues delaying equipment delivery, which resulted in revenue being pushed to future periods.

Gross Profit

	Three Months Ended March 31,
	2022			2021			Increase/(Decrease)
(in thousands except for percentages)
Gross profit:
GCR	$	8,358		$	9,395		$	(1,037)	(11.0)	%
ODR	9,982			7,834			2,148		27.4	%
Total gross profit	$	18,340		$	17,229		$	1,111	6.4	%
Total gross profit as a percentage of consolidated total revenue	16.0		%	15.2		%

The Company's gross profit for the three months ended March 31, 2022 increased by $1.1 million compared to the three months ended March 31, 2021. GCR gross profit decreased $1.0 million, or 11.0%, primarily due to lower revenue despite slightly higher margins. ODR gross profit increased $2.1 million, or 27.4%, due to an increase in revenue despite lower margins. The total gross profit percentage increased from 15.2% for the three months ended March 31, 2021 to 16.0% for the same period ended in 2022, mainly driven by the mix of higher margin ODR segment work.

The following table summarizes the Company’s recorded revisions in its contract estimates for certain GCR and ODR projects for the three months ended March 31, 2022 and 2021 (includes material gross profit changes of $0.25 million or more).

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	For the Three Months Ended March 31,
	2022			2021
(in thousands except number of projects )			Number of Projects			Number of Projects
Gross profit write-ups:
GCR	$	533	2	$	743	2
ODR	—		—	—		—
Total gross profit write-ups	$	533	2	$	743	2
Gross profit write-downs:
GCR	$	(604)	2	$	(768)	2
ODR	—		—	—		—
Total gross profit write-downs	$	(604)	2	$	(768)	2
Total gross profit write-downs, net	$	(71)		$	(25)

During the three months ended March 31, 2022, the Company recorded total net gross profit write-downs, regardless of materiality, of $1.4 million compared to total net gross profit write-downs of $0.5 million for the three months ended March 31, 2021.

Selling, General and Administrative

	Three Months Ended March 31,
	2022			2021			Increase/(Decrease)
(in thousands except for percentages)
Selling, general and administrative:
GCR	$	8,565		$	9,114		$	(549)	(6.0)	%
ODR	9,570			7,354			2,216		30.1	%
Corporate	599			677			(78)		(11.5)	%
Total selling, general and administrative	$	18,734		$	17,145		$	1,589	9.3	%
Total selling, general and administrative as a percentage of consolidated total revenue	16.3		%	15.1		%

The Company's SG&A expense for the three months ended March 31, 2022 increased by approximately $1.6 million compared to the three months ended March 31, 2021. The increase in SG&A was primarily due to a $1.4 million increase associated with costs incurred by the Acquired Entities in the Jake Marshall Transaction, a $0.6 million increase in travel and entertainment expense and a $0.3 million increase in professional fees, partially offset by a $0.5 million decrease in payroll related expenses primarily related to the wind down of its Southern California branch. Additionally, SG&A as a percentage of revenue were 16.3% for the three months ended March 31, 2022 and 15.1% for the three months ended March 31, 2021.

Amortization of Intangibles

	Three Months Ended March 31,
	2022		2021		Increase/(Decrease)
(in thousands except for percentages)
Amortization of intangibles (Corporate)	$	399	$	104	$	295	283.7	%

Total amortization expense for the three months ended March 31, 2022 was $0.4 million as compared to $0.1 million for the three months ended March 31, 2021. As a result of the Jake Marshall Transaction, the Company acquired certain intangible assets in which the Company recognized approximately $0.3 million of amortization expense for the three months ended March 31, 2022. See Note 5 for further information on the Company's intangible assets.

Other Expenses

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	Three Months Ended March 31,
	2022		2021		Increase/(Decrease)
(in thousands except for percentages)
Other (expenses) income:
Interest expense, net	$	(486)	$	(1,264)	$	778	(61.6)	%
Gain on disposition of property and equipment	(36)		(86)		50		(58.1)	%
Loss on early termination of operating lease	(817)		—		(817)		100.0	%
Loss on early debt extinguishment	—		(1,961)		1,961		100.0	%
Gain on change in fair value of warrant liability	—		14		(14)		(100.0)	%
Total other expenses	$	(1,339)	$	(3,297)	$	1,958	(59.4)	%

Other (expenses) income consisted of interest expense of $0.5 million for the three months ended March 31, 2022 as compared to $1.3 million for the three months ended March 31, 2021. The reduction in interest expense period over period was due to the refinancing of the higher interest rate debt with a lower interest rate debt instrument as a result of the 2021 Refinancing and the A&R Wintrust Agreement. The decrease in other expenses period over period was also attributable to a prior year loss of $2.0 million on the early extinguishment of debt associated with the Company's 2021 Refinancing. During the three months ended March 31, 2022, the Company recognized an $0.8 million loss as a result of the early termination of its Pittsburgh operating lease. See Note 12 for further information.

Income Taxes

The Company recorded a $0.6 million and $1.0 million income tax benefit for the three months ended March 31, 2022 and 2021, respectively. The effective tax rate was 28.9% and 31.2% for the three months ended March 31, 2022 and 2021, respectively.

GCR and ODR Backlog Information

The Company refers to its estimated revenue on uncompleted contracts, including the amount of revenue on contracts for which work has not begun, less the revenue it had recognized under such contracts, as “backlog.” Backlog includes unexercised contract options. The Company's backlog includes projects that have a written award, a letter of intent, a notice to proceed or an agreed upon work order to perform work on mutually accepted terms and conditions. Additionally, the difference between the Company's backlog and remaining performance obligations is due to the portion of unexercised contract options that are excluded, under certain contract types, from the Company's remaining performance obligations as these contracts can be canceled for convenience at any time by the Company or the customer without considerable cost incurred by the customer. Additional information related to the Company's remaining performance obligations is provided in Note 4.

Given the multi-year duration of many of the Company's contracts, revenue from backlog is expected to be earned over a period that will extend beyond one year. The Company's GCR backlog as of March 31, 2022 was $340.7 million compared to $337.2 million at December 31, 2021. In addition, ODR backlog as of March 31, 2022 was $106.9 million compared to $98.0 million at December 31, 2021. Of the total backlog at March 31, 2022, the Company expects to recognize approximately $294.7 million by the end of 2022.

COVID-19 Update

In March 2020, the World Health Organization declared the outbreak of the coronavirus disease 2019 (“COVID-19”) a global pandemic. The COVID-19 pandemic has caused significant disruption and volatility on a global scale resulting in, among other things, an economic slowdown, impacts to global supply chains, and the possibility of a continued economic recession. In limited instances, during fiscal 2020, the Company faced disruptions due to the COVID-19 pandemic as certain projects chose to shutdown work irrespective of the existence or applicability of government action. In most markets, construction is considered an essential business and the Company continued to staff its projects and perform work during fiscal 2020 and into 2021, and most of the projects that were in progress at the time shutdowns commenced were restarted.

As new variants of the virus emerge, the Company remains cautious as many factors remain unpredictable. The Company actively monitors and responds to the changing conditions created by the pandemic, with focus on prioritizing the health and safety of the Company’s employees, dedicating resources to support the Company’s communities, and innovating to address the Company’s customers’ needs. During 2021, the Company faced impacts of both the Delta and Omicron variants, with disruptions to the Company’s workforce, which impacted revenue.

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Supply chain disruptions, material shortages and escalating commodity prices as a result of COVID-19 have continued into 2022. During the first quarter of 2022, the Company was impacted by supply chain issues delaying equipment delivery, which resulted in revenue being pushed to future periods. The impact of the COVID-19 pandemic on the Company’s vendors and the pricing and availability of materials or supplies utilized in the Company’s operations continues to evolve and may have an adverse impact on the Company’s operations in future periods. The Company continues to monitor the short- and long-term impacts of the pandemic, including the current supply chain disruptions.

As vaccines have become more readily available, the Company has experienced a growing number of its clients requiring that the Company's workforce present on the client's property be vaccinated against the virus. Additionally, requirements to mandate COVID-19 vaccination of the Company's workforce or requirements of its unvaccinated employees to be tested could result in labor disruptions, employee attrition and difficulty securing future labor needs. Additionally, see “Item 1A. Risk Factors” in the Company's Annual Report on Form 10-K for the year ended December 31, 2021 for discussion of risks associated with the COVID-19 pandemic.

The Company continues to monitor developments involving our workforce, customers, suppliers and vendors and take steps to mitigate against additional impacts, but given the unprecedented and evolving nature of these circumstances, it cannot predict the full extent of the impact that COVID-19 will have on the Company's operating results, financial condition and liquidity.

Seasonality, Cyclicality and Quarterly Trends

Severe weather can impact the Company’s operations. In the northern climates where it operates, and to a lesser extent the southern climates as well, severe winters can slow the Company’s productivity on construction projects, which shifts revenue and gross profit recognition to a later period. The Company’s maintenance operations may also be impacted by mild or severe weather. Mild weather tends to reduce demand for its maintenance services, whereas severe weather may increase the demand for its maintenance and spot services. The Company’s operations also experience mild cyclicality, as building owners typically work through maintenance and capital projects at an increased level during the third and fourth calendar quarters of each year.

Effect of Inflation and Tariffs

The prices of products such as steel, pipe, copper and equipment from manufacturers are subject to fluctuation and increases. It is difficult to accurately measure the impact of inflation, tariffs and price escalation due to the imprecise nature of the estimates required. However, these effects are, at times, material to our results of operations and financial condition. During fiscal year 2021 and through the first quarter of 2022, we have experienced higher cost of materials on specific projects and delays in our supply chain for equipment and service vehicles from the manufacturers, and we expect these higher costs and delays in our supply chain to persist through the remainder of 2022. When appropriate, we include cost escalation factors into our bids and proposals, as well as limit the acceptance time of our bid. In addition, we are often able to mitigate the impact of future price increases by entering into fixed price purchase orders for materials and equipment and subcontracts on our projects. Notwithstanding these efforts, if we experience significant disruptions to our supply chain, we may need to delay certain projects that would otherwise be accretive to our business and this may also impact the conversion rate of our current backlog into revenue.

Liquidity and Capital Resources

Cash Flows

The Company's liquidity needs relate primarily to the provision of working capital (defined as current assets less current liabilities) to support operations, funding of capital expenditures, and investment in strategic opportunities. Historically, liquidity has been provided by operating activities and borrowings from commercial banks and institutional lenders.

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The following table presents summary cash flow information for the periods indicated:

	Three months ended March 31,
	2022		2021
(in thousands)
Net cash (used in) provided by:
Operating activities	$	(2,965)	$	(17,375)
Investing activities	(130)		5
Financing activities	6,685		12,409
Net increase (decrease) in cash, cash equivalents and restricted cash	$	3,590	$	(4,961)
Noncash investing and financing transactions:
Right of use assets obtained in exchange for new operating lease liabilities	$	—	$	156
Right of use assets obtained in exchange for new finance lease liabilities	864		87
Right of use assets disposed or adjusted modifying operating lease liabilities	(1,276)		36
Right of use assets disposed or adjusted modifying finance lease liabilities	(19)		—
Interest paid	459		1,319
Cash paid (received) for income taxes	$	9	$	(45)

The Company's cash flows are primarily impacted period to period by fluctuations in working capital. Factors such as the Company's contract mix, commercial terms, days sales outstanding (“DSO”) and delays in the start of projects may impact the Company's working capital. In line with industry practice, the Company accumulates costs during a given month then bills those costs in the current month for many of its contracts. While labor costs associated with these contracts are paid weekly and salary costs associated with the contracts are paid bi-weekly, certain subcontractor costs are generally not paid until the Company receives payment from its customers (contractual “pay-if-paid” terms). The Company has not historically experienced a large volume of write-offs related to its receivables and contract assets. The Company regularly assesses its receivables for collectability and provides allowances for doubtful accounts where appropriate. The Company believes that its reserves for doubtful accounts are appropriate as of March 31, 2022 and December 31, 2021, but adverse changes in the economic environment may impact certain of its customers’ ability to access capital and compensate the Company for its services, as well as impact project activity for the foreseeable future.

The Company's existing current backlog is projected to provide substantial coverage of forecasted GCR revenue for one year from the date of the financial statement issuance. The Company's current cash balance, together with cash it expects to generate from future operations along with borrowings available under its credit facility, are expected to be sufficient to finance its short- and long-term capital requirements (or meet working capital requirements) for the next twelve months. In addition to the future operating cash flows of the Company, along with its existing borrowing availability and access to financial markets, the Company currently believes it will be able to meet any working capital and future operating requirements, and capital investment forecast opportunities for the next twelve months.

The following table represents our summarized working capital information:

(in thousands, except ratios)	March 31, 2022		December 31, 2021
Current assets	$	209,995	$	192,906
Current liabilities	(141,590)		(129,742)
Net working capital	$	68,405	$	63,164
Current ratio (1)	1.48		1.49

(1)    Current ratio is calculated by dividing current assets by current liabilities.

As discussed above and in Note 6, as of March 31, 2022, the Company was in compliance with all financial maintenance covenants as required by its credit facility.

Cash Flows (Used in) Provided by Operating Activities

The following is a summary of the significant sources (uses) of cash from operating activities:

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	Three Months Ended March 31,
(in thousands)	2022		2021		Cash Inflow (outflow)
Cash flows from operating activities:
Net loss	$	(1,516)	$	(2,282)	$	766
Non-cash operating activities(1)	4,682		5,130		(448)
Changes in operating assets and liabilities:
Accounts receivable	(19,698)		2,584		(22,282)
Contract assets	8,320		(1,986)		10,306
Other current assets	(2,130)		(2,025)		(105)
Accounts payable, including retainage	(105)		(8,813)		8,708
Prepaid income taxes	(47)		—		(47)
Accrued taxes payable	(501)		(654)		153
Contract liabilities	7,732		(8,853)		16,585
Operating lease liabilities	(1,117)		(994)		(123)
Accrued expenses and other current liabilities	1,419		513		906
Other long-term liabilities	(4)		5		(9)
Cash used in working capital	(6,131)		(20,223)		14,092
Net cash used in operating activities	$	(2,965)	$	(17,375)	$	14,410

(1)Represents non-cash activity associated with depreciation and amortization, provision for doubtful accounts, stock-based compensation expense, operating lease expense, amortization of debt issuance costs, deferred income tax provision, gain on sale of property and equipment, loss on early debt extinguishment, loss on early termination of operating lease and changes in the fair value of warrant liabilities.

During the three months ended March 31, 2022, the Company used $3.0 million in cash in its operating activities, which consisted of cash used in working capital of $6.1 million and a net loss for the period of $1.5 million, partially offset by non-cash adjustments of $4.7 million (primarily depreciation and amortization, stock-based compensation expense and operating lease expense). During the three months ended March 31, 2021, the Company used $17.4 million from its operating activities, which consisted of cash used in working capital of $20.2 million and a net loss of $2.3 million, partially offset by non-cash adjustments of $5.1 million (primarily depreciation and amortization, stock-based compensation expense, operating lease expense and a loss on early debt extinguishment).

The increase in operating cash flows during the three months ended March 31, 2022 compared to the three months ended March 31, 2021 was primarily attributable to a $26.9 million cash inflow period-over-period related to the aggregate change in our contract assets and liabilities and a $8.7 million period-over-period cash inflow related to the change in accounts payable, including retainage. These cash inflows were partially offset by a $22.2 million period-over-period cash outflow related to the change in accounts receivable. The increase in our overbilled position was due to the timing of contract billings and the recognition of contract revenue. In addition, the cash inflow associated with accounts payable, including retainage was due to the timing of payments, and the cash outflow associated with our accounts receivable was due to the timing of receipts.

Cash Flows (Used in) Provided by Investing Activities

Cash flows used in investing activities were $0.1 million for the three months ended March 31, 2022 compared to cash flows provided by investing activities $5.0 thousand for the three months ended March 31, 2021 For the three months ended March 31, 2022, $0.2 million was used to purchase property and equipment, offset by $39.0 thousand in proceeds from the sale of property and equipment. For the three months ended March 31, 2021, $0.2 million was used to purchase property and equipment, offset by $0.2 million in proceeds from the sale of property and equipment.

The majority of our cash used for investing activities in both periods was for capital additions pertaining to tools and equipment, computer software and hardware purchases, office furniture and office related leasehold improvements.

Cash Flows Provided by (Used in) Financing Activities

Cash flows provided by financing activities were $6.7 million and $12.4 million for the three months ended March 31, 2022 and 2021, respectively. For the three months ended March 31, 2022, we received proceeds from the following: $9.4 million in

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proceeds from borrowings under the A&R Wintrust Revolving Loan and $0.2 million associated with proceeds from contributions to the ESPP. These proceeds were partly offset by $1.9 million of scheduled principal payments on the Wintrust Term Loan, $0.7 million for payments on finance leases and $0.4 million in taxes related to net share settlement of equity awards.

For the three months ended March 31, 2021, we received proceeds from the following: $22.8 million, net of fees and expenses, in conjunction with our common stock offering in February 2021, $2.0 million from the exercise of warrants and $30.0 million in connection with the refinancing of the 2019 Refinancing Term Loan with the Wintrust Loans. These proceeds were offset by the $39.0 million payment in full of the 2019 Refinancing Term Loan and associated $1.4 million prepayment penalty and other extinguishment costs, a $0.5 million scheduled principal payment on the Wintrust Term Loan, $0.7 million for payments on finance leases, $0.4 million in taxes related to net share settlement of equity awards and $0.6 million for payments related to debt issuance costs related to the Wintrust Term Loan and Revolver.

The following table reflects our available funding capacity as of March 31, 2022:

(in thousands)
Cash & cash equivalents			$	18,066
Credit agreement:
A&R Wintrust Revolving Loan	$	25,000
Outstanding borrowings on the A&R Wintrust Revolving Loan	(9,400)
Outstanding letters of credit	(3,300)
Net credit agreement capacity available			12,300
Total available funding capacity			$	30,366

Cash Flow Summary

Management continued to devote additional resources to its billing and collection efforts during the three months ended March 31, 2022. Management continues to expect that growth in its ODR business, which is less sensitive to the cash flow issues presented by large GCR projects, will positively impact our cash flow trends.

Provided that the Company’s lenders continue to provide working capital funding, the Company believes based on its current reforecast that our current cash and cash equivalents of $18.1 million as of March 31, 2022, cash payments to be received from existing and new customers, and availability of borrowing under the A&R Wintrust Revolving Loan (pursuant to which we had $12.3 million of availability as of March 31, 2022) will be sufficient to meet our working capital and capital expenditure requirements for at least the next 12 months.

Debt and Related Obligations

Long-term debt consists of the following obligations as of:

(in thousands)	March 31, 2022		December 31, 2021
A&R Wintrust Term Loan - term loan payable in quarterly installments of principal, (commencing in December 2021) plus interest through February 2026	33,024		34,881
A&R Wintrust Revolving Loan	9,400		—
Finance leases – collateralized by vehicles, payable in monthly installments of principal, plus interest ranging from 4.40% to 6.45% through 2025	5,317		5,132
Total debt	47,741		40,013
Less - Current portion of long-term debt	(13,222)		(9,879)
Less - Unamortized discount and debt issuance costs	(299)		(318)
Long-term debt	$	34,220	$	29,816

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On the 2021 Refinancing Date, the Company refinanced its 2019 Refinancing Term Loan and 2019 Revolving Credit Facility with proceeds from the issuance of the Wintrust Term Loan. As a result of the 2021 Refinancing, the Company prepaid all principal, interest, fees and other obligations outstanding under the 2019 Refinancing Agreements and terminated its 2019 Refinancing Term Loan and 2019 Refinancing Revolving Credit Facility. In addition, on the 2021 Refinancing Date, the Company recognized a loss on the early extinguishment of debt of $2.0 million, which consisted of the write-off of $2.6 million of unamortized discount and financing costs, the reversal of the $2.0 million CB warrants liability and the prepayment penalty and other extinguishment costs of $1.4 million.

In conjunction with the Jake Marshall Transaction, the Company entered into the A&R Wintrust Credit Agreement. In accordance with the terms of the A&R Wintrust Credit Agreement, Lenders provided to LFS (i) a $35.5 million senior secured term loan; and (ii) a $25 million senior secured revolving credit facility with a $5 million sublimit for the issuance of letters of credit. The overall A&R Wintrust Term Loan commitment under the A&R Wintrust Credit Agreement was recast at $35.5 million in connection with the A&R Wintrust Credit Agreement. A portion of the A&R Wintrust Term Loan commitment was used to fund the closing purchase price of the Jake Marshall Transaction. The A&R Credit Agreement was also amended to: permit the Company to undertake the Jake Marshall Transaction, make certain adjustments to the covenants under the A&R Wintrust Credit Agreement (which were largely done to make certain adjustments for the Jake Marshall Transaction), allow for the Earnout Payments under the Jake Marshall Transaction and make other corresponding changes to the A&R Wintrust Credit Agreement.

See Note 6 for further discussion.

Surety Bonding

In connection with our business, we are occasionally required to provide various types of surety bonds that provide an additional measure of security to our customers for our performance under certain government and private sector contracts. Our ability to obtain surety bonds depends upon our capitalization, working capital, past performance, management expertise and external factors, including the capacity of the overall surety market. Surety companies consider such factors in light of the amount of our backlog that we have currently bonded and their current underwriting standards, which may change from time-to-time. The bonds we provide typically reflect the contract value. As of March 31, 2022 and December 31, 2021, the Company had approximately $134.9 million and $159.2 million in surety bonds outstanding, respectively. In January 2022, our bonding capacity was increased from $700.0 million to $800.0 million. We believe that our $800.0 million bonding capacity provides us with a significant competitive advantage relative to many of our competitors which have limited bonding capacity. See Note 13 for further discussion.

Insurance and Self-Insurance

We purchase workers’ compensation and general liability insurance under policies with per-incident deductibles of $250,000 per occurrence. Losses incurred over primary policy limits are covered by umbrella and excess policies up to specified limits with multiple excess insurers. We accrue for the unfunded portion of costs for both reported claims and claims incurred but not reported. The liability for unfunded reported claims and future claims is reflected on the Condensed Consolidated Balance Sheets as current and non-current liabilities. The liability is computed by determining a reserve for each reported claim on a case-by-case basis based on the nature of the claim and historical loss experience for similar claims plus an allowance for the cost of incurred but not reported claims. The current portion of the liability is included in accrued expenses and other current liabilities on the Condensed Consolidated Balance Sheets. The non-current portion of the liability is included in other long-term liabilities on the Condensed Consolidated Balance Sheets.

We are self-insured related to medical and dental claims under policies with annual per-claimant and annual aggregate stop-loss limits. We accrue for the unfunded portion of costs for both reported claims and claims incurred but not reported. The liability for unfunded reported claims and future claims is reflected on the Condensed Consolidated Balance Sheets as a current liability in accrued expenses and other current liabilities. See Note 13 for further discussion.

Multiemployer Pension Plans

We participate in approximately 40 multiemployer pension plans (“MEPPs”) that provide retirement benefits to certain union employees in accordance with various collective bargaining agreements (“CBAs”). As one of many participating employers in these MEPPs, we are responsible with the other participating employers for any plan underfunding. Our contributions to a particular MEPP are established by the applicable CBAs; however, required contributions may increase based on the funded status of an MEPP and legal requirements of the Pension Protection Act of 2006 (the “PPA”), which requires substantially underfunded MEPPs to implement a funding improvement plan (“FIP”) or a rehabilitation plan (“RP”) to improve their funded status. Factors that could impact funded status of an MEPP include, without limitation, investment performance, changes in the participant demographics, decline in the number of contributing employers, changes in actuarial assumptions and the utilization

35

of extended amortization provisions. Assets contributed to the MEPPs by us may be used to provide benefits to employees of other participating employers. If a participating employer stops contributing to an MEPP, the unfunded obligations of the MEPP may be borne by the remaining participating employers.

An FIP or RP requires a particular MEPP to adopt measures to correct its underfunding status. These measures may include, but are not limited to an increase in a company’s contribution rate as a signatory to the applicable CBA, or changes to the benefits paid to retirees. In addition, the PPA requires that a 5.0% surcharge be levied on employer contributions for the first year commencing shortly after the date the employer receives notice that the MEPP is in critical status and a 10.0% surcharge on each succeeding year until a CBA is in place with terms and conditions consistent with the RP.

We could also be obligated to make payments to MEPPs if we either cease to have an obligation to contribute to the MEPP or significantly reduce our contributions to the MEPP because we reduce the number of employees who are covered by the relevant MEPP for various reasons, including, but not limited to, layoffs or closure of a subsidiary assuming the MEPP has unfunded vested benefits. The amount of such payments (known as a complete or partial withdrawal liability) would equal our proportionate share of the MEPPs’ unfunded vested benefits. We believe that certain of the MEPPs in which we participate may have unfunded vested benefits. Due to uncertainty regarding future factors that could trigger withdrawal liability, we are unable to determine (a) the amount and timing of any future withdrawal liability, if any, and (b) whether our participation in these MEPPs could have a material adverse impact on our financial condition, results of operations or liquidity.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

We are a smaller reporting company as defined in Rule 12b-2 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”); therefore, pursuant to Item 301(c) of Regulation S-K, we are not required to provide the information required by this Item.

Item 4. Controls and Procedures

Conclusion Regarding the Effectiveness of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures, as defined in Rule 13a-15(e) under the Exchange Act. Based on that evaluation as of March 31, 2022, our Chief Executive Officer and Chief Financial Officer concluded that our Company’s disclosure controls and procedures were effective.

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting identified in connection with the evaluation required by Rule 13a-15(d) and 15d-15(d) of the Exchange Act that occurred during the period covered by this Quarterly Report on Form 10-Q that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

Inherent Limitations on Effectiveness of Controls

In designing and evaluating the disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, cannot provide absolute assurance of achieving the desired control objectives. Our management recognizes that any control system, no matter how well designed and operated, is based upon certain judgments and assumptions and cannot provide absolute assurance that its objectives will be met. Similarly, an evaluation of controls cannot provide absolute assurance that misstatements due to error or fraud will not occur or that all control issues and instances of fraud, if any, have been detected.

36

Part II

Item 1. Legal Proceedings

See Note 13 for information regarding legal proceedings.

Item 1A. Risk Factors

There have been no material changes from the risk factors previously disclosed in the Company's Annual Report on Form 10-K for the year ended December 31, 2021.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

None.

Item 3. Defaults Upon Senior Securities

None.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

None.

37

Item 6. Exhibits

Exhibit	Description
3.1	Second Amended and Restated Certificate of Incorporation (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K (File No. 001-36541) filed with the U.S. Securities and Exchange Commission on July 26, 2016).
3.2	Certificate of Designation of Class A Preferred Stock (incorporated by reference to Exhibit 3.2 to the Company’s Current Report on Form 8-K (File No. 001-36541) filed with the U.S. Securities and Exchange Commission on July 26, 2016).
3.3	Certificate of Correction to Certificate of Designation of Class A Preferred Stock (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K (File No. 001-36541) filed with the U.S. Securities and Exchange Commission on August 24, 2016).
3.4	Amended and Restated Bylaws (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K (File No. 001-36541) filed with the U.S. Securities and Exchange Commission on September 1, 2021).
10.1	First Amendment and Waiver to the Amended and Restated Credit Agreement, dated as of May 5, 2022, by and among Limbach Facility Services LLC, Limbach Holdings LLC, the other Loan Parties party thereto, the Lenders party thereto and Wheaton Bank & Trust Company, N.A., as Administrative Agent and L/C Issuer, filed herewith as Exhibit 10.1.
31.1	Certification of the Chief Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of the Chief Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	Certification of the Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2	Certification of the Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS	XBRL Instance Document.
101.SCH	XBRL Taxonomy Extension Schema Document.
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document.
101.LAB	XBRL Taxonomy Extension Label Linkbase Document.
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document.
101.DEF	XBRL Taxonomy Extension Definition Document.

*Filed herewith.

38

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	LIMBACH HOLDINGS, INC.
	/s/ Charles A. Bacon, III
	Charles A. Bacon, III
	Chief Executive Officer
	(Principal Executive Officer)
	/s/ Jayme L. Brooks
	Jayme L. Brooks
	Chief Financial Officer
	(Principal Financial and Accounting Officer)
Date: May 10, 2022

39

EX-10.1

EXHIBIT 10.1

FIRST AMENDMENT AND WAIVER TO AMENDED AND RESTATED CREDIT AGREEMENT

This FIRST AMENDMENT AND WAIVER TO AMENDED AND RESTATED CREDIT AGREEMENT (this “Amendment”), dated as of May 5, 2022 (the “Effective Date”), is by and among LIMBACH FACILITY SERVICES LLC, a Delaware limited liability company (“Borrower”), LIMBACH HOLDINGS LLC, a Delaware limited liability company (“Intermediate Holdco”), the other persons designated as “Loan Parties” in the Credit Agreement (as defined below), the Lenders (as defined below) party hereto, and WHEATON BANK & TRUST COMPANY, N.A., a Subsidiary of Wintrust Financial Corporation, as Agent.

RECITALS

A.    Borrower, the other persons designated as “Loan Parties” from time to time party thereto, the lenders from time to time party thereto (collectively, the “Lenders” and each individually a “Lender”) and Agent are party to that certain Amended and Restated Credit Agreement, dated as of December 2, 2021 (as amended hereby and as it may be further amended, restated, amended and restated, supplemented or otherwise modified from time to time, the “Credit Agreement”);

B.    Pursuant to the Credit Agreement, Lenders made and committed to make certain loans to Borrower as follows: (i) a term loan in an aggregate principal amount equal to Thirty Five Million Five Hundred Thousand and 00/100 Dollars ($35,500,000.00) (“the “Term Loan”) and (ii) a revolving credit facility with an aggregate commitment equal to Twenty Five Million and 00/100 Dollars ($25,000,000.00) the “Revolving Loan” and collectively with the Term Loan, the “Loans”);

C.    Borrower has advised Administrative Agent it has not entered into a fully executed authenticated control agreement with Truist in accordance with section 1 of Schedule 6.28 of the Credit Agreement (“Depository Account Event”);

D.    Borrower has requested, and the Lenders have agreed to, among other things (i) waive the Depository Account Event; (ii) amend the definition of Total Funded Debt; (iii) amend the definition of EBITDA; and (iv) to make such other amendments and modifications to the Credit Agreement as described herein; and

E.    The Lenders are willing to agree to amend and modify the Credit Agreement as herein provided, in each case, subject to the and on the terms and conditions set forth herein.

NOW, THEREFORE, in consideration of the premises herein contained and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties, intending to be legally bound, agree as follows:

AGREEMENTS:

1.Definitions. All capitalized undefined terms used in this Amendment (including without limitation, in the Recitals hereto) shall have the meanings assigned thereto in the Credit Agreement, as amended hereby.

2.Waiver. Agent and the Lenders, subject to the satisfaction of the conditions precedent set forth in Section 4 of this Amendment and in reliance on the representations and warranties set forth in Section 5 of this Amendment, hereby waive the Depository Account Event; provided, however, the waiver provided in this Section 2 does not (a) consent to or waive any other Default or Event of Default, or (b) otherwise amend, waive or modify any provision, in any respect, of the Credit Agreement and the Loan Documents, except as otherwise specifically provided for hereunder. Further, the conditional waiver set forth in this Section 2 is also expressly conditioned upon (i) Jake Marshall, LLC and Coating

Solutions, LLC causing each of their operating accounts including all depository and remittance accounts (but excluding any Excluded Deposit Accounts) to be maintained with the Administrative Agent on or prior to July 31, 2022.

3.Amendments. In reliance on the representations and warranties set forth in Section 5 of this Amendment and subject to the satisfaction of the conditions precedent set forth in Section 4 of this Amendment, the Credit Agreement is hereby amended as follows:

(a)The definition of “EBITDA” in Section 1.1,“Definitions,” of the Credit Agreement is amended and restated as follows:

“EBITDA” means, with reference to any period, Net Income for such period plus, without duplication, the sum of all amounts deducted in arriving at such Net Income amount in respect of (a) Interest Expense for such period; (b) federal, state, and local income taxes for such period; (c) depreciation of fixed assets and amortization of intangible assets for such period; (d) non-cash charges including, (i) stock based compensation expenses, (ii) loss on extinguishment of Indebtedness under the Existing Credit Agreements or the Original Credit Agreement, (iii) change in fair value of warrants, or (iv) hedging obligations; (e) transaction expenses paid on or before that date occurring six months after the Original Closing Date in connection with the transactions contemplated by the Loan Documents or Original Credit Agreement in an aggregate amount not to exceed $500,000; (f) non-recurring costs, fees, expenses and charges related to any Permitted Acquisition, Investments permitted under Section 6.14, or Equity Issuance (in each case, whether or not consummated) in an aggregate amount not to exceed (i) with regard to issuance costs in connection with any Equity Issuance, $1,000,000, (ii) with regard to any other such event such costs, fees and expenses in an amount not to exceed $150,000 for any such individual action or $300,000 in any consecutive twelve (12) month period; (g) restructuring (including lease termination fees) and severance expenses in an amount not to exceed $250,000 in any consecutive twelve (12) month period; (h) legal expenses related to pursuing claim recoveries for Legacy Claims in an amount not to exceed $250,000 in any consecutive twelve (12) month period; (i) transaction expenses paid on or before that date occurring nine months after the Restatement Effective Date in connection with the Jake Marshall Acquisition and this Amendment and Restatement of the Original Credit Agreement in an aggregate amount not to exceed $1,100,000; (j) any costs incurred (including prepayment premiums) paid in connection with the repayment in full of the obligations outstanding under the Existing Credit Agreements; (k) restructuring charges and lease breakage costs in an aggregate amount not to exceed $3,920,000 incurred on or before December 31, 2022; and (l) other addbacks approved by the Required Lenders in its sole discretion, minus, without duplication and to the extent reflected as a gain or otherwise included in the calculation of Net Income for such period, non-cash gains (for the avoidance of doubt, in connection with any Pro Forma calculation with regard to the Jake Marshall Acquisition, any income attributable to any PPP loan or the Employee Retention Credit shall be treated as non-cash gains for any calculation of EBITDA).

(b)The definition of “Disposition” in Section 1.1 “Definitions,” of the Credit Agreement is amended and restated as follows:

“Disposition” means the sale, lease, conveyance or other disposition of Property, other than sales or other dispositions expressly permitted under Sections 6.13(a), (c), (d), (e), (h), (i) and (j).

(c)The definition of “Excess Cash Flow” in Section 1.1 “Definitions,” of the Credit Agreement is amended and restated as follows:

    2

“Excess Cash Flow” means, with respect to any period, the amount (if any) by which (a) EBITDA (without giving effect to any pro forma adjustments made pursuant to the definition of Net Income) during such period exceeds (b) the sum (without duplication) of (i) the aggregate amount of all scheduled payments of principal on debt (including the Term Loans) actually paid in cash during such period, plus (ii) the aggregate amount of Capital Expenditures paid in cash during such period and not financed with proceeds of Indebtedness (but excluding credit extended under the Revolving Loan), plus (iii) the aggregate amount of all federal, state and local taxes paid in cash with respect to such period, plus (iv) the aggregate amount of Interest Expense for such period paid in cash, plus (v) the cash portion of Restricted Payments of the type referred to in Section 6.15 actually made for such period, including Tax Distributions, to the extent permitted to be made under the Loan Documents plus (vi) any costs incurred (including prepayment premiums) and paid in connection with the repayment in full of the obligations outstanding under the Existing Credit Agreements plus (vii) amounts added back to EBITDA pursuant to clauses (f), (g), (h), (i) and (k) of the definition thereof, plus (viii) cash payments actually made in such period in respect of social security taxes that had been deferred in accordance with the CARES Act.

(d)The definition of “Total Funded Debt” in Section 1.1,“Definitions,” of the Credit Agreement is amended and restated as follows:

“Total Funded Debt” means, at any time the same is to be determined, for Parent and its Subsidiaries on a consolidated basis, the sum (but without duplication) of: (a) the outstanding principal amount of all obligations, whether current or long-term, for borrowed money (including Obligations hereunder) and all obligations evidenced by bonds, debentures, notes, loan agreements or other similar instruments; (b) the aggregate amount of Capitalized Lease Obligations (excluding Capitalized Lease Obligations for real estate approved by each Lender in its sole discretion); (c) the maximum amount available to be drawn (less any amount of cash collateral in respect of such maximum amount) under issued and outstanding letters of credit (including standby and commercial), bankers’ acceptances, bank guaranties, and similar instruments (other than any premiums payable under the Bonding Agreements, unless not paid when due); (d) all Guarantees with respect to outstanding Indebtedness of the types specified in clauses (a) through (c) above; and (e) all Indebtedness of the types referred to in clauses (a) through (d) above of any partnership or joint venture (other than a joint venture that is itself a corporation or limited liability company) in which the Borrower or a Subsidiary is a general partner or joint venturer, unless such Indebtedness is expressly made non-recourse to the Borrower or such Subsidiary.

(e)Section 6.13, “Consolidation, Merger and Sale of Assets” of the Credit Agreement is amended to delete “and” after clause (h), insert “and” after clause (i) and insert a new clause (j) to read as follows:

(j)    the sale and leaseback of real property approved by each Lender in its sole discretion.

4.Conditions to Effectiveness. The agreement by the Administrative Agent and the Lenders to amend the Credit Agreement in the manner set forth herein is subject to satisfaction of, and expressly conditioned upon, all of the following conditions precedent (the “First Amendment Effective Date”:

(a)This Amendment. The Administrative Agent shall have received counterparts of this Amendment, duly executed by the Borrower and each Lender, and acknowledged by each of the Guarantors.

    3

(b)Corporate Documents. The Administrative Agent shall have received all information and copies of all documents, including records of requisite corporate or limited liability company action and proceedings of the Borrower which the Administrative Agent may have requested in connection therewith, such documents to be certified by appropriate corporate officers or Governmental Authority.

(c)Other Documents. The Administrative Agent shall have received any other documents or instruments reasonably requested by the Administrative Agent in connection with the execution of this Amendment.

(d)Fees and Expenses. Borrower shall have paid to the Administrative Agent, for the ratable account of the Lenders, an amendment fee in an amount equal to $25,000 and all fees and expenses required to be paid in connection herewith, and all fees and expenses invoiced on or before the date hereof, shall have been paid in full in cash or will be paid on the date hereof.

5.Representations and Warranties. The Borrower represents and warrants that (a) it has the corporate power and authority to make, deliver and perform this Amendment, (b) it has taken all necessary corporate or other action to authorize the execution, delivery and performance of this Amendment, (c) this Amendment has been duly executed and delivered on behalf of the Borrower, (d) this Amendment constitutes a legal, valid and binding obligation of the Borrower, enforceable against the Borrower in accordance with its terms, except as enforceability may be limited by applicable bankruptcy, insolvency, reorganization, moratorium or similar laws affecting the enforcement of creditors' rights generally and by general equitable principles, (e) each of the representations and warranties made by the Borrower in or pursuant to the Loan Documents is true and correct in all material respects on and as of the date hereof as if made on and as of the date hereof, except for any representation and warranty made as of an earlier date, which representation and warranty shall remain true and correct as of such earlier date; provided that any representation or warranty that is qualified as to “materiality”, “Material Adverse Effect” or similar language shall be true and correct (after giving effect to any qualification therein) in all respects on such respective dates, (f) it has no defenses, setoffs, rights of recoupment, counterclaims or claims of any nature whatsoever with respect to the Loan Documents or the Obligations due thereunder, and to the extent any such defenses, setoffs, rights of recoupment, counterclaims or claims may exist, the same are hereby expressly waived, released and discharged, and (g) no Default or Event of Default has occurred and is continuing after giving effect hereto.

6.Reaffirmation of Covenants. By its execution hereof, Borrower hereby expressly (a) acknowledges and agrees to the terms and conditions of this Amendment, (b) reaffirms all of its respective covenants, representations, warranties and other obligations set forth in the Credit Agreement and the other Loan Documents to which it is a party, (c) ratifies and confirms all security interests granted to the Administrative Agent and the Lenders under the Loan Documents, and (d) acknowledges that its respective covenants, representations, warranties and other obligations set forth in the Credit Agreement and the other Loan Documents to which it is a party remain in full force and effect.

7.Costs and Expenses. The Borrower agrees to pay in accordance with Section 10.12 of the Credit Agreement all reasonable costs and expenses of the Administrative Agent and the Lenders in connection with the preparation, execution and delivery of this Amendment and the other instruments and documents to be delivered hereunder, including, without limitation, the reasonable fees and out-of-pocket expenses of counsel for the Administrative Agent with respect thereto and with respect to advising Lenders as to their rights and responsibilities hereunder and thereunder.

8.Execution in Counterparts. This Amendment may be executed by one or more of the parties to this Amendment on any number of separate counterparts, and all of said counterparts taken together shall be deemed to constitute one and the same instrument. Delivery of an executed signature page of this Amendment by facsimile transmission shall be effective as delivery of a manually executed counterpart hereof.

    4

9.Entire Agreement. This Amendment is the entire agreement, and supersedes any prior agreements and contemporaneous oral agreements, of the parties concerning its subject matter.

10.Full Force and Effect; Inconsistency. Except as herein modified, the terms, conditions and covenants of the Loan Documents shall remain unchanged and otherwise in full force and effect. In the event of an inconsistency between this Amendment and the Loan Documents, the terms herein shall control.

11.Laws of Illinois. The validity, interpretation and enforcement of this Amendment shall be governed by the internal laws of the State of Illinois but excluding any principles of conflicts of law or other rule of law that would cause the application of the law of any juris diction other than the laws of the State of Illinois.

12.Successors and Assigns. This Amendment shall be binding on and inure to the benefit of the parties and their respective heirs, beneficiaries, successors and permitted assigns.

13.Waiver of Jury Trial; Arbitration. EACH PARTY HERETO HEREBY IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY IN ANY LEGAL PROCEEDING DIRECTLY OR INDIRECTLY ARISING OUT OF OR RELATING TO THIS AMENDMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY OR THEREBY (WHETHER BASED ON CONTRACT, TORT OR ANY OTHER THEORY).EACH PARTY HERETO (A) CERTIFIES THAT NO REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER PERSON HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PERSON WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER AND CONSENT AND (B) ACKNOWLEDGES THAT IT AND THE OTHER PARTIES HERETO HAVE BEEN INDUCED TO ENTER INTO THIS AGREEMENT AND THE OTHER LOAN DOCUMENTS BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION.

[SIGNATURE PAGE FOLLOWS]

    5

IN WITNESS WHEREOF, this Amendment has been executed on the date first written above, to be effective as of the Effective Date.

BORROWER:

LIMBACH FACILITY SERVICES LLC,

By: /s/ Jayme Brooks            

Name: Jayme Brooks    

Title: Chief Financial Officer        

GUARANTORS:

LIMBACH HOLDINGS LLC,

By: /s/ Jayme Brooks            

Name: Jayme Brooks    

Title: Chief Financial Officer        

LIMBACH COMPANY LLC,

By: /s/ Jayme Brooks            

Name: Jayme Brooks    

Title: Chief Financial Officer        

HARPER LIMBACH LLC,

By: /s/ Jayme Brooks            

Name: Jayme Brooks    

Title: Chief Financial Officer        

LIMBACH COMPANY LP,

By: /s/ Jayme Brooks            

Name: Jayme Brooks    

Title: Chief Financial Officer    

HARPER LIMBACH CONSTRUCTION LLC,

By: /s/ Jayme Brooks            

Name: Jayme Brooks    

Title: Chief Financial Officer    

JAKE MARSHALL, LLC,

By: /s/ Jayme Brooks            

Name: Jayme Brooks    

Title: Chief Financial Officer

[Signature Page to First Amendment]

COATING SOLUTIONS, LLC,

By: /s/ Jayme Brooks            

Name: Jayme Brooks    

Title: Chief Financial Officer

LIMBACH HOLDINGS LLC,

By: /s/ Jayme Brooks            

Name: Jayme Brooks    

Title: Chief Financial Officer

[Signature Page to First Amendment]

WHEATON BANK & TRUST COMPANY, N.A., as a Lender, as L/C Issuer and as Administrative Agent,

By: /s/ David Nelson    

Name: David Nelson

Title: Vice President

[Signature Page to First Amendment]

M&T BANK,
as a Lender

By: /s/ Robert J. Tiskus    

Name: Robert J. Tiskus    

Title: Vice President

[Signature Page to First Amendment]

BANK OF THE WEST,
as a Lender

By: /s/ Peter Thursby    

Name: Peter Thursby

Title: Managing Director

[Signature Page to First Amendment]

OLD SECOND NATIONAL BANK AS SUCCESSOR BY MERGER TO WEST SUBURBAN BANK,
as a Lender

By: /s/ Jason G. Fels    

Name: Jason G. Fels

Title: Vice President

[Signature Page to First Amendment]

EX-31.1

EXHIBIT 31.1

CERTIFICATION PURSUANT TO SECTION 302

CERTIFICATION OF CEO

I, Charles A. Bacon, III, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q for the quarter ended March 31, 2022 of Limbach Holdings, Inc. (the "registrant");

2.Based on my knowledge, this quarterly report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this quarterly report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this quarterly report;

4.The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this quarterly report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

	/s/ Charles A. Bacon, III
	Charles A. Bacon, III
	Chief Executive Officer
Date: May 10, 2022

EX-31.2

EXHIBIT 31.2

CERTIFICATION PURSUANT TO SECTION 302

CERTIFICATION OF CFO

I, Jayme L. Brooks, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q for the quarter ended March 31, 2022 of Limbach Holdings, Inc. (the "registrant");

2.Based on my knowledge, this quarterly report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this quarterly report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this quarterly report;

4.The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:

a.Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this quarterly report is being prepared;

b.Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a.All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b.Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

	/s/ Jayme L. Brooks
	Jayme L. Brooks
	Chief Financial Officer
Date: May 10, 2022

EX-32.1

EXHIBIT 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of Limbach Holdings, Inc. (the “Company”) for the quarter ended March 31, 2022 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned Charles A. Bacon, III, the Chief Executive Officer of the Company, hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of the undersigned’s knowledge and belief:

(1)the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. Section 78m(a) or 78o(d)); and

(2)the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: May 10, 2022
By	/s/ Charles A. Bacon, III
Charles A. Bacon, III, Chief Executive Officer
(Principal Executive Officer)

EX-32.2

EXHIBIT 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of Limbach Holdings, Inc. (the “Company”) for the quarter ended March 31, 2022 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned Jayme L. Brooks, the Chief Financial Officer of the Company, hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of the undersigned’s knowledge and belief:

(1)the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. Section 78m(a) or 78o(d)); and

(2)the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: May 10, 2022
By	/s/ Jayme L. Brooks
Jayme L. Brooks, Chief Financial Officer
(Principal Financial Officer)

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Cover - shares	3 Months Ended
	Mar. 31, 2022	May 09, 2022
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity File Number	001-36541
Entity Registrant Name	LIMBACH HOLDINGS, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	46-5399422
Entity Address, Address Line One	797 Commonwealth Drive
Entity Address, City or Town	Warrendale
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	15086
City Area Code	412
Local Phone Number	359-2100
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	LMB
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		10,423,068
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Entity Central Index Key	0001606163
Current Fiscal Year End Date	--12-31
Former Address
Document Information [Line Items]
Entity Address, Address Line One	1251 Waterfront Place
Entity Address, Address Line Two	Suite 201
Entity Address, City or Town	Pittsburgh
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	15222

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Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 18,066	$ 14,476
Restricted cash	113	113
Accounts receivable (net of allowance for doubtful accounts of $270 and $263 as of March 31, 2022 and December 31, 2021, respectively)	108,969	89,327
Contract assets	75,543	83,863
Income tax receivable	161	114
Other current assets	7,143	5,013
Total current assets	209,995	192,906
Property and equipment, net	20,759	21,621
Intangible assets, net	16,508	16,907
Goodwill	11,370	11,370
Operating lease right-of-use assets	17,719	20,119
Deferred tax asset	4,407	4,330
Other assets	245	259
Total assets	281,003	267,512
Current liabilities:
Current portion of long-term debt	13,222	9,879
Current operating lease liabilities	3,762	4,366
Accounts payable, including retainage	63,734	63,840
Contract liabilities	34,444	26,712
Accrued income taxes	0	501
Accrued expenses and other current liabilities	26,428	24,444
Total current liabilities	141,590	129,742
Long-term debt	34,220	29,816
Long-term operating lease liabilities	14,787	16,576
Other long-term liabilities	3,535	3,540
Total liabilities	194,132	179,674
Commitments and contingencies
STOCKHOLDERS’ EQUITY
Common stock, $0.0001 par value; 100,000,000 shares authorized, 10,423,068 issued and outstanding as of March 31, 2022 and 10,304,242 at December 31, 2021	1	1
Additional paid-in capital	85,553	85,004
Retained Earnings	1,317	2,833
Total stockholders’ equity	86,871	87,838
Total liabilities and stockholders’ equity	$ 281,003	$ 267,512

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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Accounts receivable, allowance for credit loss, current	$ 270	$ 263
Common stock, par or stated value per share (in usd per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares, issued (in shares)	10,423,068	10,304,242
Common stock, shares, outstanding (in shares)	10,423,068	10,304,242

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Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Revenue	$ 114,822	$ 113,344
Cost of revenue	96,482	96,115
Gross profit	18,340	17,229
Operating expenses:
Selling, general and administrative	18,734	17,145
Amortization of intangibles	399	104
Total operating expenses	19,133	17,249
Operating loss	(793)	(20)
Other (expenses) income:
Interest expense, net	(486)	(1,264)
Loss on disposition of property and equipment	(36)	(86)
Loss on early termination of operating lease	(817)	0
Loss on early debt extinguishment	0	(1,961)
Gain on change in fair value of warrant liability	0	14
Total other expenses	(1,339)	(3,297)
Loss before income taxes	(2,132)	(3,317)
Income tax benefit	(616)	(1,035)
Net loss	$ (1,516)	$ (2,282)
Loss per common share:
Basic (in usd per share)	$ (0.15)	$ (0.25)
Diluted (in usd per share)	$ (0.15)	$ (0.25)
Weighted average number of shares outstanding:
Basic (in shares)	10,420,690	9,218,087
Diluted (in shares)	10,420,690	9,218,087

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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional paid-in capital	Accumulated deficit
Beginning balance (in shares) at Dec. 31, 2020		7,926,137
Beginning balance at Dec. 31, 2020	$ 53,732	$ 1	$ 57,612	$ (3,881)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	677		677
Shares issued related to vested restricted stock units (in shares)		89,446
Shares issued related to vested restricted stock units	0
Tax withholding related to vested restricted stock units	(183)		(183)	0
Stock issued related to employee stock purchase plan (in shares)		8,928
Shares issued related to employee stock purchase plan	92		92
Shares issued related to exercise of warrants (in shares)		172,869
Shares issued related to the exercise of warrants	1,989		1,989
Shares issued related to offering (in shares)		2,051,025
Shares issued related to sale of common stock	22,773		22,773
Net loss	(2,282)			(2,282)
Ending balance (in shares) at Mar. 31, 2021		10,248,405
Ending balance at Mar. 31, 2021	76,798	$ 1	82,960	(6,163)
Beginning balance (in shares) at Dec. 31, 2021		10,304,242
Beginning balance at Dec. 31, 2021	87,838	$ 1	85,004	2,833
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	599		599
Shares issued related to vested restricted stock units (in shares)		105,928
Shares issued related to vested restricted stock units	0		0
Tax withholding related to vested restricted stock units	(148)		(148)
Stock issued related to employee stock purchase plan (in shares)		12,898
Shares issued related to employee stock purchase plan	98		98	0
Net loss	(1,516)			(1,516)
Ending balance (in shares) at Mar. 31, 2022		10,423,068
Ending balance at Mar. 31, 2022	$ 86,871	$ 1	$ 85,553	$ 1,317

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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net loss	$ (1,516)	$ (2,282)
Adjustments to reconcile net loss to cash used in operating activities:
Depreciation and amortization	2,062	1,495
Provision for doubtful accounts	56	28
Stock-based compensation expense	599	677
Noncash operating lease expense	1,157	1,043
Amortization of debt issuance costs	32	190
Deferred income tax provision	(77)	(336)
Loss on sale of property and equipment	36	86
Loss on early termination of operating lease	817	0
Loss on early debt extinguishment	0	1,961
Gain on change in fair value of warrant liability	0	(14)
Changes in operating assets and liabilities:
Accounts receivable	(19,698)	2,584
Contract assets	8,320	(1,986)
Other current assets	(2,130)	(2,025)
Accounts payable, including retainage	(105)	(8,813)
Prepaid income taxes	(47)	0
Accrued taxes payable	(501)	(654)
Contract liabilities	7,732	(8,853)
Operating lease liabilities	(1,117)	(994)
Accrued expenses and other current liabilities	1,419	513
Other long-term liabilities	(4)	5
Net cash used in operating activities	(2,965)	(17,375)
Cash flows from investing activities:
Proceeds from sale of property and equipment	39	226
Purchase of property and equipment	(169)	(221)
Net cash used in (provided by) investing activities	(130)	5
Cash flows from financing activities:
Proceeds from Wintrust Term Loan (as defined in Note 6)	0	30,000
Payments on Wintrust and A&R Wintrust Term Loans	(1,857)	(500)
Proceeds from A&R Wintrust Revolving Loan (as defined in Note 6)	9,400	0
Payments on 2019 Refinancing Term Loan (as defined in Note 6)	0	(39,000)
Prepayment penalty and other costs associated with early debt extinguishment	0	(1,376)
Proceeds from the sale of common stock	0	22,773
Proceeds from the exercise of warrants	0	1,989
Payments on finance leases	(660)	(667)
Payments of debt issuance costs	0	(593)
Taxes paid related to net-share settlement of equity awards	(363)	(384)
Proceeds from contributions to Employee Stock Purchase Plan	165	167
Net cash provided by financing activities	6,685	12,409
(Decrease) increase in cash, cash equivalents and restricted cash	3,590	(4,961)
Cash, cash equivalents and restricted cash, beginning of period	14,589	42,260
Cash, cash equivalents and restricted cash, end of period	18,179	37,299
Noncash investing and financing transactions:
Right of use assets obtained in exchange for new operating lease liabilities	0	156
Right of use assets obtained in exchange for new finance lease liabilities	864	87
Right-of-use assets disposed or adjusted modifying operating leases liabilities	(1,276)	36
Right-of-use assets disposed or adjusted modifying finance leases liabilities	(19)	0
Interest paid	459	1,319
Cash paid (received) for income taxes	$ 9	$ (45)

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Business and Organization	3 Months Ended
	Mar. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business and Organization	Business and OrganizationLimbach Holdings, Inc. (the “Company,” “we” or “us”), a Delaware corporation headquartered in Warrendale, Pennsylvania, was formed on July 20, 2016 as a result of a business combination with Limbach Holdings LLC (“LHLLC”). The Company is an integrated building systems solutions firm whose expertise is in the design, modular prefabrication, installation, management and maintenance of heating, ventilation, air-conditioning (“HVAC”), mechanical, electrical, plumbing and controls systems. The Company provides comprehensive facility services consisting of mechanical construction, full HVAC service and maintenance, energy audits and retrofits, engineering and design build services, constructability evaluation, equipment and materials selection, offsite/prefabrication construction, and the complete range of sustainable building solutions. The Company's customers operate in diverse industries including, but not limited to, healthcare, life sciences, data centers, industrial and light manufacturing, entertainment, education and government. The Company operates primarily in the Northeast, Mid-Atlantic, Southeast, Midwest, and Southwestern regions of the United States.The Company operates in two segments, (i) General Contractor Relationships (“GCR”), in which the Company generally manages new construction or renovation projects that involve primarily HVAC, plumbing, or electrical services awarded to the Company by general contractors or construction managers, and (ii) Owner Direct Relationships (“ODR”), in which the Company provides maintenance or service primarily on HVAC, plumbing or electrical systems, building controls and specialty contracting projects direct to, or assigned by, building owners or property managers. This work is primarily performed under fixed price, modified fixed price, and time and material contracts over periods of typically less than two years.

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Significant Accounting Policies

3 Months Ended

Mar. 31, 2022

Accounting Policies [Abstract]

Significant Accounting Policies

Significant Accounting Policies

Basis of Presentation

References in these financial statements to the Company refer collectively to the accounts of Limbach Holdings, Inc. and its wholly-owned subsidiaries, including LHLLC, Limbach Facility Services LLC (“LFS”), Limbach Company LLC, Limbach Company LP, Harper Limbach LLC, Harper Limbach Construction LLC, Limbach Facility & Project Solutions LLC, Jake Marshall, LLC (“JMLLC”) and Coating Solutions, LLC (“CSLLC”) for all periods presented, unless otherwise indicated. All intercompany balances and transactions have been eliminated.

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) for interim financial information and with the requirements of Form 10-Q and Rule 8-03 of Regulation S-X for smaller reporting companies. Consequently, certain information and note disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to those rules and regulations, although the Company believes that the disclosures made are adequate to make the information not misleading. Readers of this report should refer to the consolidated financial statements and the notes thereto included in the Company's most recent Annual Report on Form 10-K filed with the Securities and Exchange Commission (“SEC”) on March 16, 2022.

Use of Estimates

The preparation of the condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements for assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, the reported amounts of revenue and expenses during the reported period, and the accompanying notes. Management believes that its most significant estimates and assumptions have been based on reasonable and supportable assumptions and the resulting estimates are reasonable for use in the preparation of the condensed consolidated financial statements. The Company’s significant estimates include estimates associated with revenue recognition on construction contracts, costs incurred through each balance sheet date, intangibles, property and equipment, fair value accounting for acquisitions, insurance reserves and contingencies. If the underlying estimates and assumptions upon which the condensed consolidated financial statements are based change in the future, actual amounts may differ from those included in the accompanying condensed consolidated financial statements.

Unaudited Interim Financial Information

The accompanying interim Condensed Consolidated Balance Sheets, Condensed Consolidated Statements of Operations, Condensed Consolidated Statements of Stockholders’ Equity and Condensed Consolidated Statements of Cash Flows for the periods presented are unaudited. Also, within the notes to the condensed consolidated financial statements, the Company has included unaudited information for these interim periods. These unaudited interim condensed consolidated financial statements

have been prepared in accordance with GAAP. In the Company's opinion, the accompanying unaudited condensed consolidated financial statements contain all normal and recurring adjustments necessary for a fair statement of the Company’s financial position as of March 31, 2022, its results of operations and its cash flows for the three months ended March 31, 2022. The results for the three months ended March 31, 2022 are not necessarily indicative of the results to be expected for the year ending December 31, 2022.

The Condensed Consolidated Balance Sheet as of December 31, 2021 was derived from the Company's audited financial statements included in its Annual Report on Form 10-K filed with the SEC on March 16, 2022, but is presented as condensed and does not contain all of the footnote disclosures from the annual financial statements.

Recently Adopted Accounting Standards

In November 2021, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers, which creates an exception to the general recognition and measurement principle for contract assets and contract liabilities from contracts with customers acquired in a business combination. Under this exception, an acquirer applies ASC 606, Revenue from Contracts with Customers, to recognize and measure contract assets and contract liabilities on the acquisition date. ASC 805 generally requires the acquirer in a business combination to recognize and measure the assets it acquires and the liabilities it assumes at fair value on the acquisition date. The changes are effective for annual periods beginning after December 15, 2022. The Company early adopted ASU 2021-08 in December 2021. The contract assets and contract liabilities associated with the Jake Marshall Transaction have been valued in accordance with this standard.

Recent Accounting Pronouncements

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments, which introduced an expected credit loss methodology for the measurement and recognition of credit losses on most financial instruments, including trade receivables and off-balance sheet credit exposure. Under this guidance, an entity is required to consider a broader range of information to estimate expected credit losses, which may result in earlier recognition of losses. This ASU also requires disclosure of information regarding how a company developed its allowance, including changes in the factors that influenced management’s estimate of expected credit losses and the reasons for those changes. The guidance is effective for smaller reporting companies on January 1, 2023 with early adoption permitted. The adoption of this standard will be through a cumulative-effect adjustment to retained earnings as of the effective date. Based on its historical experience, the Company does not expect that this pronouncement will have a significant impact in its condensed consolidated financial statements or on the estimate of the allowance for doubtful accounts.

The FASB has issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting in March 2020. This new guidance provides optional expedients for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform, on financial reporting. The risk of termination of the London Interbank Offered Rate (LIBOR), has caused regulators to undertake reference rate reform initiatives to identify alternative reference rates that are more observable or transaction based that are less susceptible to manipulation. ASU 2020-04 is effective between March 12, 2020 and December 31, 2022.

In addition, in January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848): Scope. The amendments in this update refine the scope for certain optional expedients and exceptions for contract modifications and hedge accounting to apply to derivative contracts and certain hedging relationships affected by the discounting transition. The amendments in this update are effective for all entities as of March 12, 2020 through December 31, 2022. The Company is currently evaluating the impact of adopting the reference rate reform guidance (both ASU 2020-04 and ASU 2021-01) on its condensed consolidated financial statements. As discussed in Note 6, the A&R Credit Agreement removed LIBOR as a benchmark rate and now utilizes SOFR (as defined in the A&R Credit Agreement) as its replacement.

In August 2020, the FASB issued ASU 2020-06, Debt - Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity's Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity's Own Equity, which simplifies the accounting for certain financial instruments with characteristics of liabilities and equity and amends the scope guidance for contracts in an entity's own equity. The ASU addresses how convertible instruments are accounted for in the calculation of diluted earnings per share by using the if-converted method. The guidance is effective for all entities for fiscal years beginning after March 31, 2024, albeit early adoption is permitted no earlier than fiscal years beginning after December 15, 2020. Management is currently assessing the impact of this pronouncement on its condensed consolidated financial statements.

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Acquisitions

3 Months Ended

Mar. 31, 2022

Business Combination and Asset Acquisition [Abstract]

Acquisitions

Acquisitions

Jake Marshall Transaction

On December 2, 2021 (the “Effective Date”), the Company and LFS entered into a Membership Interest Purchase Agreement (the “Purchase Agreement”) with JMLLC, CSLLC (together with JMLLC, the “Acquired Companies” and each an “Acquired Company”) and the owners of the Acquired Companies (collectively, the “Sellers”), pursuant to which LFS purchased all of the outstanding membership interests in the Acquired Companies from the Sellers (the transactions contemplated by the Purchase Agreement collectively being the “Jake Marshall Transaction”). The Jake Marshall Transaction closed on the Effective Date. As a result of the Jake Marshall Transaction, each of the Acquired Companies became wholly-owned indirect subsidiaries of the Company. The acquisition expands the Company’s market share within its existing product and service lines.

Total consideration paid by the Company for the Jake Marshall Transaction at closing was $21.3 million (the “Closing Purchase Price”), consisting of cash paid to the Sellers, net of adjustments for working capital. Of the consideration paid to the Sellers, $1.0 million is being held in escrow for indemnification purposes. The purchase price is subject to customary post-closing adjustments. In addition, the Sellers may receive up to an aggregate of $6.0 million in cash, consisting of two tranches of $3.0 million, as defined in the Purchase Agreement, if the gross profit of the Acquired Companies equals or exceeds $10.0 million in (i) the approximately 13 month period from closing through December 31, 2022 (the “2022 Earnout Period”) or (ii) fiscal year 2023 (the “2023 Earnout Period”), respectively (collectively, the “Earnout Payments”). To the extent, however, that the gross profit of the Acquired Companies is less than $10.0 million, but exceeds $8.0 million, during any of the 2022 Earnout Period or 2023 Earnout Period, the $3.0 million amount will be prorated for such period.

Allocation of Purchase Price. The Jake Marshall Transaction was accounted for as a business combination using the acquisition method. The following table summarizes the final purchase price and estimated fair values of assets acquired and liabilities assumed as of the Effective Date, with any excess of purchase price over estimated fair value of the identified net assets acquired recorded as goodwill. As a result of the acquisition, the Company recognized $5.2 million of goodwill, all of which was allocated to the ODR segment and fully deductible for tax purposes. Such goodwill primarily related to anticipated future earnings. The following table summarizes the allocation of the fair value of the assets and liabilities of the Jake Marshall Transaction as of the Effective Date by the Company.

(in thousands)	Purchase Price Allocation
Consideration:
Cash	$	21,313
Earnout provision	3,089
Total Consideration	24,402
Fair value of assets acquired:
Cash and cash equivalents	2,336
Accounts receivable	7,165
Contract assets	1,711
Other current assets	164
Property and equipment	5,762
Intangible assets	5,710
Amount attributable to assets acquired	22,848
Fair value of liabilities assumed:
Accounts payable, including retainage	2,655
Accrued expenses and other current liabilities	570
Contract liabilities	462
Amount attributable to liabilities assumed	3,687
Goodwill	$	5,241

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Revenue from Contracts with Customers

3 Months Ended

Mar. 31, 2022

Revenue from Contract with Customer [Abstract]

Revenue from Contracts with Customers

Revenue from Contracts with Customers

The Company generates revenue principally from fixed-price construction contracts to deliver HVAC, plumbing, and electrical construction services to its customers. The duration of its contracts generally ranges from six months to two years. Revenue from fixed price contracts is recognized on the cost-to-cost method, measured by the relationship of total cost incurred to total estimated contract costs. Revenue from time and materials contracts is recognized as services are performed. The Company believes that its extensive experience in HVAC, plumbing, and electrical projects, and its internal cost review procedures during the bidding process, enable it to reasonably estimate costs and mitigate the risk of cost overruns on fixed price contracts.

The Company generally invoices customers on a monthly basis, based on a schedule of values that breaks down the contract amount into discrete billing items. Costs and estimated earnings in excess of billings on uncompleted contracts are recorded as a contract asset until billable under the contract terms. Billings in excess of costs and estimated earnings on uncompleted contracts are recorded as a contract liability until the related revenue is recognizable. The Company classifies contract assets and liabilities that may be settled beyond one year from the balance sheet date as current, consistent with the length of time of the Company’s project operating cycle.

Contract assets

Contract assets include amounts due under retainage provisions and costs and estimated earnings in excess of billings. The components of the contract asset balances as of the respective dates were as follows:

(in thousands)	March 31, 2022		December 31, 2021		Change
Contract assets
Costs in excess of billings and estimated earnings	$	41,949	$	47,447	$	(5,498)
Retainage receivable	33,594		36,416		(2,822)
Total contract assets	$	75,543	$	83,863	$	(8,320)

Retainage receivable represents amounts invoiced to customers where payments have been partially withheld, typically 10%, pending the completion of certain milestones, satisfaction of other contractual conditions or the completion of the project. Retainage agreements vary from project to project and balances could be outstanding for several months or years depending on a number of circumstances such as contract-specific terms, project performance and other variables that may arise as the Company makes progress towards completion.

Contract assets represent the excess of contract costs and profits (or contract revenue) over the amount of contract billings to date and are classified as a current asset. Contract assets result when either: (1) the appropriate contract revenue amount has been recognized over time in accordance with ASC Topic 606, but a portion of the revenue recorded cannot be currently billed due to the billing terms defined in the contract, or (2) costs are incurred related to certain claims and unapproved change orders. Claims occur when there is a dispute regarding both a change in the scope of work and the price associated with that change. Unapproved change orders occur when a change in the scope of work results in additional work being performed before the parties have agreed on the corresponding change in the contract price. The Company routinely estimates recovery related to claims and unapproved change orders as a form of variable consideration at the most likely amount it expects to receive and to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. Claims and unapproved change orders are billable upon the agreement and resolution between the contractual parties and after the execution of contractual amendments. Increases in claims and unapproved change orders typically result from costs being incurred against existing or new positions; decreases normally result from resolutions and subsequent billings.

The current estimated net realizable value on such items as recorded in contract assets and contract liabilities in the condensed consolidated balance sheets was $39.9 million and $38.1 million as of March 31, 2022 and December 31, 2021, respectively. The Company currently anticipates that the majority of such amounts will be approved or executed within one year. The resolution of those claims and unapproved change orders that may require litigation or other forms of dispute resolution proceedings may delay the timing of billing beyond one year.

Contract liabilities

Contract liabilities include billings in excess of contract costs and provisions for losses. The components of the contract liability balances as of the respective dates were as follows:

(in thousands)	March 31, 2022		December 31, 2021		Change
Contract liabilities
Billings in excess of costs and estimated earnings	$	34,053	$	26,293	$	7,760
Provisions for losses	391		419		(28)
Total contract liabilities	$	34,444	$	26,712	$	7,732

Billings in excess of costs represent the excess of contract billings to date over the amount of contract costs and profits (or contract revenue) recognized to date. The balance may fluctuate depending on the timing of contract billings and the recognition of contract revenue.

Provisions for losses are recognized in the condensed consolidated statements of operations at the uncompleted performance obligation level for the amount of total estimated losses in the period that evidence indicates that the estimated total cost of a performance obligation exceeds its estimated total revenue.

The net underbilling position for contracts in process consisted of the following:

(in thousands)	March 31, 2022		December 31, 2021
Revenue earned on uncompleted contracts	$	679,170	$	758,450
Less: Billings to date	(671,274)		(737,296)
Net underbilling	$	7,896	$	21,154
(in thousands)	March 31, 2022		December 31, 2021
Costs in excess of billings and estimated earnings	$	41,949	$	47,447
Billings in excess of costs and estimated earnings	(34,053)		(26,293)
Net underbilling	$	7,896	$	21,154

Revisions in Contract Estimates

The following table summarizes the Company’s recorded revisions in its contract estimates for certain GCR and ODR projects for the three months ended March 31, 2022 and 2021 (includes material gross profit changes of $0.25 million or more).

	For the Three Months Ended March 31,
	2022			2021
(in thousands except number of projects )			Number of Projects			Number of Projects
Gross profit write-ups:
GCR	$	533	2	$	743	2
ODR	—		—	—		—
Total gross profit write-ups	$	533	2	$	743	2
Gross profit write-downs:
GCR	$	(604)	2	$	(768)	2
ODR	—		—	—		—
Total gross profit write-downs	$	(604)	2	$	(768)	2
Total gross profit write-downs, net	$	(71)		$	(25)

During the three months ended March 31, 2022, the Company recorded total net gross profit write-downs, regardless of materiality, of $1.4 million compared to total net gross profit write-downs of $0.5 million for the three months ended March 31, 2021.

Remaining Performance Obligations

Remaining performance obligations represent the transaction price of firm orders for which work has not been performed and exclude unexercised contract options. The Company’s remaining performance obligations include projects that have a written award, a letter of intent, a notice to proceed or an agreed upon work order to perform work on mutually accepted terms and conditions.

As of March 31, 2022, the aggregate amount of the transaction prices allocated to the remaining performance obligations of the Company's GCR and ODR segment contracts were $340.7 million and $90.4 million, respectively. The Company currently estimates that 60% and 73% of its GCR and ODR remaining performance obligations as of March 31, 2022, respectively, will be recognized as revenue during the remainder of 2022, with the substantial majority of remaining performance obligations to be recognized within 24 months, although the timing of the Company's performance is not always under its control.

Additionally, the difference between remaining performance obligations and backlog is due to the exclusion of a portion of the Company’s ODR agreements under certain contract types from the Company’s remaining performance obligations as these contracts can be canceled for convenience at any time by the Company or the customer without considerable cost incurred by the customer.

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Goodwill and Intangibles

3 Months Ended

Mar. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangibles

Goodwill and Intangibles

Goodwill

Goodwill was $11.4 million as of March 31, 2022 and December 31, 2021 and is entirely associated with the Company's ODR segment. The Company tests its goodwill and indefinite-lived intangible assets allocated to its reporting units for impairment annually on October 1, or more frequently if events or circumstances indicate that it is more likely than not that the fair value of its reporting units and indefinite-lived intangible asset are less than their carrying amount. The Company has the option to assess goodwill for possible impairment by performing a qualitative analysis to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. A quantitative assessment is performed if the qualitative assessments results in a more-likely-than-not determination or if a qualitative assessment is not performed.

The Company did not recognize any impairment charges on its goodwill or intangible assets for the three months ended March 31, 2022 or March 31, 2021.

Intangible Assets

Intangible assets are comprised of the following:     

(in thousands)	Gross carrying amount		Accumulated amortization		Net intangible assets, excluding goodwill
March 31, 2022
Amortized intangible assets:
Customer relationships – GCR – Jake Marshall	$	570	$	(27)	$	543
Customer relationships – ODR – Jake Marshall	3,050		(134)		2,916
Customer relationships – ODR – Limbach	4,710		(3,555)		1,155
Favorable leasehold interests – Limbach	190		(86)		104
Backlog – GCR – Jake Marshall	260		(55)		205
Backlog – ODR – Jake Marshall	680		(143)		537
Trade name – Jake Marshall	1,150		(62)		1,088
Total amortized intangible assets	10,610		(4,062)		6,548
Unamortized intangible assets:
Trade name – Limbach(1)	9,960		—		9,960
Total unamortized intangible assets	9,960		—		9,960
Total amortized and unamortized assets, excluding goodwill	$	20,570	$	(4,062)	$	16,508

(1)    The Company has determined that its trade name has an indefinite useful life. The Limbach trade name has been in existence since the Company’s founding in 1901 and therefore is an established brand within the industry.

(in thousands)	Gross carrying amount		Accumulated amortization		Net intangible assets, excluding goodwill
December 31, 2021
Amortized intangible assets:
Customer relationships – GCR – Jake Marshall	$	570	$	(6)	$	564
Customer relationships – ODR – Jake Marshall	3,050		(35)		3,015
Customer relationships – ODR – Limbach	4,710		(3,475)		1,235
Favorable leasehold interests – Limbach	190		(82)		108
Backlog – GCR – Jake Marshall	260		(14)		246
Backlog – ODR – Jake Marshall	680		(36)		644
Trade name – Jake Marshall	1,150		(15)		1,135
Total amortized intangible assets	10,610		(3,663)		6,947
Unamortized intangible assets:
Trade name – Limbach	9,960		—		9,960
Total unamortized intangible assets	9,960		—		9,960
Total amortized and unamortized assets, excluding goodwill	$	20,570	$	(3,663)	$	16,907

Total amortization expense for the Company's definite-lived intangible assets was $0.4 million and $0.1 million for the three months ended March 31, 2022 and 2021, respectively.

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Debt

3 Months Ended

Mar. 31, 2022

Debt Disclosure [Abstract]

Debt

Debt

Long-term debt consists of the following obligations as of:

(in thousands)	March 31, 2022		December 31, 2021
A&R Wintrust Term Loan - term loan payable in quarterly installments of principal, (commencing in December 2021) plus interest through February 2026	33,024		34,881
A&R Wintrust Revolving Loan	9,400		—
Finance leases – collateralized by vehicles, payable in monthly installments of principal, plus interest ranging from 4.40% to 6.45% through 2025	5,317		5,132
Total debt	47,741		40,013
Less - Current portion of long-term debt	(13,222)		(9,879)
Less - Unamortized discount and debt issuance costs	(299)		(318)
Long-term debt	$	34,220	$	29,816

On February 24, 2021 (the “2021 Refinancing Date”), the Company refinanced its 2019 Refinancing Term Loan (as defined below) and 2019 Revolving Credit Facility (as defined below) with proceeds from the issuance of the Wintrust Term Loan (as defined below) (the “2021 Refinancing”). As a result of the 2021 Refinancing, the Company prepaid all principal, interest, fees and other obligations outstanding under the 2019 Refinancing Agreements (as defined below) and terminated its 2019 Refinancing Term Loan, 2019 Refinancing Revolving Credit Facility and the CB Warrants (as defined below). In addition, on the 2021 Refinancing Date, the Company recognized a loss on the early extinguishment of debt of $2.0 million, which consisted of the write-off of $2.6 million of unamortized discount and financing costs, the reversal of the $2.0 million CB warrants (defined below) liability and the prepayment penalty and other extinguishment costs of $1.4 million.

2019 Refinancing Agreement - 2019 Term Loans

On April 12, 2019 (the “2019 Refinancing Closing Date”), LFS entered into a financing agreement (the “2019 Refinancing Agreement”) with the lenders thereto and Cortland Capital Market Services LLC, as collateral agent and administrative agent and CB Agent Services LLC (“CB”), as origination agent. The 2019 Refinancing Agreement consisted of (i) a $40.0 million term loan (the “2019 Refinancing Term Loan”) and (ii) a new $25.0 million multi-draw delayed draw term loan (the “2019 Delayed Draw Term Loan” and, collectively with the 2019 Refinancing Term Loan, the “2019 Term Loans”). On November 14, 2019, the Company entered into an amendment to the 2019 Refinancing Agreement which, among other things, amended the interest rate and certain covenants in the 2019 Refinancing Agreement.

Prior to its refinancing in February 2021, the 2019 Refinancing Agreement would have matured on April 12, 2022. Required amortization was $1.0 million per quarter and commenced with the fiscal quarter ending September 30, 2020. There was an unused line fee of 2.0% per annum on the undrawn portion of the 2019 Delayed Draw Term Loan, and there was a make-whole premium on prepayments made prior to the 19-month anniversary of the 2019 Refinancing Closing Date. This make-whole provision guaranteed that the Company would pay no less than 18 months’ applicable interest to the lenders under the 2019 Refinancing Agreement.

The interest rate on borrowings under the 2019 Refinancing Agreement was, at the option of LFS and its subsidiaries, either LIBOR (with a 2.00% floor) plus 11.00% or a base rate (with a 3.00% minimum) plus 10.00%. At the 2021 Refinancing Date, the interest rate in effect on the 2019 Refinancing Term Loan was 13.00%.

2019 Refinancing Agreement - CB Warrants

In connection with the 2019 Refinancing Agreement, on the 2019 Refinancing Closing Date, the Company issued to CB and the other lenders under the 2019 Refinancing Agreement warrants (the “CB Warrants”) to purchase up to a maximum of 263,314 shares of the Company's common stock at an exercise price of $7.63 per share subject to certain adjustments, including for stock dividends, stock splits or reclassifications. The actual number of shares of common stock into which the CB Warrants were exercisable at any given time were equal to: (i) the product of (x) the number of shares equal to 2% of the Company’s issued and outstanding shares of common stock on the 2019 Refinancing Closing Date on a fully diluted basis and (y) the percentage of the total 2019 Delayed Draw Term Loan made as of the exercise date, minus (ii) the number of shares previously issued under the CB Warrants. As of the 2019 Refinancing Closing Date through the 2021 Refinancing Date, no amounts had been drawn on the 2019 Delayed Draw Term Loan, so no portion of the CB Warrants were exercisable. The CB Warrants were to be exercised for cash or on a “cashless basis,” subject to certain adjustments, at any time after the 2019 Refinancing Closing Date until the expiration of such warrant at 5:00 p.m., New York time, on the earlier of (i) the five (5) year anniversary of the 2019 Refinancing Closing Date, or (ii) the liquidation of the Company.  

For the period from January 1, 2021 through the 2021 Refinancing Date, the Company recorded interest expense for the amortization of the CB Warrants liability and embedded derivative debt discounts of $0.1 million and recorded an additional $0.1 million of interest expense for the amortization of the debt issuance costs.

2019 ABL Credit Agreement

On the 2019 Refinancing Closing Date, LFS also entered into a financing agreement with the lenders thereto and Citizens Bank, N.A., as collateral agent, administrative agent and origination agent (the “2019 ABL Credit Agreement” and, together with the 2019 Refinancing Agreement, the “Refinancing Agreements”). The 2019 ABL Credit Agreement consisted of a $15.0 million revolving credit facility (the “2019 Revolving Credit Facility”). Proceeds of the 2019 Revolving Credit Facility were to be used for general corporate purposes. On the 2019 Refinancing Closing Date, the Company entered into an amendment to the 2019 ABL Credit Agreement (as amended, 2019 ABL Credit Amendment Number One and Waiver), which amended certain provisions under the 2019 ABL Credit Agreement.

The interest rate on borrowings under the 2019 ABL Credit Agreement was, at the option of LFS and its subsidiaries, either LIBOR (with a 2.0% floor) plus an applicable margin ranging from 3.00% to 3.50% or a base rate (with a 3.0% minimum) plus an applicable margin ranging from 2.00% to 2.50%. At the 2021 Refinancing Date, the interest rate in effect on the 2019 ABL Credit Agreement was 5.25%.

As of the 2021 Refinancing Date, the Company had irrevocable letters of credit in the amount of $3.4 million with its lender to secure obligations under its self-insurance program. Prior to its refinancing in February 2021, the 2019 ABL Agreement would have matured in April 2022.

Wintrust Term and Revolving Loans

On the 2021 Refinancing Date, LFS, LHLLC and the direct and indirect subsidiaries of LFS from time to time included as parties to the agreement (the “Wintrust Guarantors”) entered into a credit agreement (the “Wintrust Credit Agreement”) by and among the LFS, LHLLC, Wintrust Guarantors, the lenders party thereto from time to time, Wheaton Bank & Trust Company, N.A., a subsidiary of Wintrust Financial Corporation (collectively, “Wintrust”), as administrative agent and L/C issuer, Bank of the West as documentation agent, M&T Bank as syndication agent, and Wintrust as lead arranger and sole book runner.

In accordance with the terms of the Wintrust Credit Agreement, Lenders provided to LFS (i) a $30.0 million senior secured term loan (the “Wintrust Term Loan”); and (ii) a $25.0 million senior secured revolving credit facility with a $5.0 million sublimit for the issuance of letters of credit (the “Wintrust Revolving Loan” and, together with the Wintrust Term Loan, the “Wintrust Loans”). Proceeds of the Wintrust Loans were used to refinance certain existing indebtedness, finance working

capital and other general corporate purposes and fund certain fees and expenses associated with the closing of the Wintrust Loans.

The Wintrust Revolving Loan bore interest, at LFS’s option, at either LIBOR (with a 0.25% floor) plus 3.5% or a base rate (with a 3.0% floor) plus 0.50%, subject to a 50 basis point step-down based on the ratio between the senior debt of the Company and its subsidiaries to the EBITDA (earnings before interest, income taxes, depreciation and amortization) of the LFS and its subsidiaries for the most recently ended four fiscal quarters. The Wintrust Term Loan bore interest, at LFS’s option, at either LIBOR (with a 0.25% floor) plus 4.0% or a base rate (with a 3.0% floor) plus 1.00%, subject to a 50 (for LIBOR) or 75 (for base rate) basis point step-down based on the Senior Leverage Ratio.

LFS was required to make principal payments on the Wintrust Term Loan in $0.5 million installments on the last business day of each month commencing on March 31, 2021 with a final payment of all principal and interest not sooner paid on the Wintrust Term Loan due and payable on February 24, 2026.

In conjunction with the Jake Marshall Transaction, the Company entered into an amendment to the Wintrust Credit Agreement (the “A&R Wintrust Credit Agreement”). In accordance with the terms of the A&R Credit Agreement, Lenders provided to LFS (i) a $35.5 million senior secured term loan (the “A&R Wintrust Term Loan”); and (ii) a $25 million senior secured revolving credit facility with a $5 million sublimit for the issuance of letters of credit (the “A&R Wintrust Revolving Loan” and, together with the Term Loan, the “A&R Wintrust Loans”). The overall Wintrust Term Loan commitment under the A&R Wintrust Credit Agreement was recast at $35.5 million in connection with the A&R Credit Agreement. A portion of the A&R Wintrust Term Loan commitment was used to fund the closing purchase price of the Jake Marshall Transaction. The A&R Credit Agreement was also amended to: (i) permit the Company to undertake the Jake Marshall Transaction (ii) make certain adjustments to the covenants under the A&R Credit Agreement (which were largely done to make certain adjustments for the Jake Marshall Transaction) (iii) allow for the Earnout Payments under the Jake Marshall Transaction and (iv) make other corresponding changes to the A&R Credit Agreement.

The A&R Wintrust Revolving Loan bears interest, at LFS’s option, at either Term SOFR (as defined in the A&R Credit Agreement) (with a 0.15% floor) plus 3.60%, 3.76% or 3.92% for a tenor of one month, three months or six months, respectively, or a base rate (as set forth in the A&R Credit Agreement) (with a 3.0% floor) plus 0.50%, subject to a 50 basis point step-down based on the ratio between the senior debt of the Company and its subsidiaries to the EBITDA of LFS and its subsidiaries for the most recently ended four fiscal quarters (the “Senior Leverage Ratio”). The A&R Wintrust Term Loan bears interest, at LFS’s option, at either Term SOFR (with a 0.15% floor) plus 4.10%, 4.26% or 4.42% for a tenor of one month, three months or six months, respectively, or a base rate (with a 3.0% floor) plus 1.00%, subject to a 50 (for Term SOFR) or 75 (for base rate) basis point step-down based on the Senior Leverage Ratio. At March 31, 2022, the interest rate in effect on the Wintrust Term Loan was 4.50%

LFS is required to make principal payments on the A&R Wintrust Term Loan in installments of approximately $0.6 million on the last business day of each month commencing on December 31, 2021. Subject to defaults and remedies under the A&R Credit Agreement, the final payment of all principal and interest not sooner paid on the A&R Wintrust Term Loan is due and payable on February 24, 2026. Subject to defaults and remedies under the A&R Credit Agreement, the A&R Wintrust Revolving Loan matures and becomes due and payable by LFS on February 24, 2026.

The A&R Wintrust Loans are secured by (i) a valid, perfected and enforceable lien of the administrative agent on the ownership interests held by each of LFS and Wintrust Guarantors in their respective subsidiaries; and (ii) a valid, perfected and enforceable lien of the administrative agent on each of LFS and Wintrust Guarantors’ personal property, fixtures and real estate, subject to certain exceptions and limitations. Additionally, the re-payment of the A&R Wintrust Loans shall be jointly and severally guaranteed by each Wintrust Guarantor.

The A&R Credit Agreement contains representations and warranties, covenants and events of default that are customary for facilities of this type, as more particularly described in the A&R Credit Agreement. The A&R Wintrust Loans also contain three financial maintenance covenants, including (i) a requirement to have as of the last day of each quarter for the senior leverage ratio of the Company and its subsidiaries not to exceed an amount beginning at 2.00 to 1.00 (ii) a fixed charge coverage ratio of not less than 1.20 to 1.00 as of the last day of each fiscal quarter commencing with the fiscal quarter ending December 31, 2021, and (iii) no unfinanced capital expenditures, except for unfinanced capital expenditures in the ordinary course of business not exceeding in the aggregate $4.0 million during any fiscal year; and no default or event of default (as defined by the agreement) has occurred and is continuing, 50% of any portion of this annual limit, if not expended in the fiscal year for which it is permitted, may be carried over for expenditure in the next following fiscal year as stipulated by the agreement. LFS and its affiliates maintain various commercial and service relationships with certain members of the syndicate and their affiliates in the ordinary course of business.

As of March 31, 2022, the Company had $9.4 million of borrowings outstanding under the A&R Wintrust Revolving Loan. The Company did not have any borrowings outstanding under the A&R Wintrust Revolving Loan as of December 31, 2021. During the three months ended March 31, 2022, the maximum outstanding borrowings under the A&R Wintrust Revolving Loan at any time was $9.4 million and the average daily balance was approximately $0.1 million. For the three months ended March 31, 2022, the Company incurred interest on the A&R Wintrust Revolving Loan at a weighted average annual interest rate of 4.00%. For the three months ended March 31, 2022, commitment fees of approximately $14 thousand were paid to maintain credit availability under the A&R Wintrust Revolving Loan.

At March 31, 2022, the Company had irrevocable letters of credit in the amount of $3.3 million with the lenders under the A&R Wintrust Credit Agreement to secure obligations under its self-insurance program.

The following is a summary of the applicable margin and commitment fees payable on the available A&R Wintrust Term Loan and A&R Wintrust Revolving Loan credit commitment:

Level	Senior Leverage Ratio	Additional Margin for Prime Rate loans		Additional Margin for Prime Revolving loans		Additional Margin for Eurodollar Term loans
I	Greater than 1.00 to 1.00	1.00	%	0.50	%	0.25	%
II	Less than or equal to 1.00 to 1.00	0.25	%	—	%	0.25	%

As of March 31, 2022, the Company was in compliance with all financial maintenance covenants as required by the A&R Wintrust Loans.

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Equity

3 Months Ended

Mar. 31, 2022

Equity [Abstract]

Equity

Equity

The Company’s second amended and restated certificate of incorporation currently authorizes the issuance of 100,000,000 shares of common stock, par value $0.0001, and 1,000,000 shares of preferred stock, par value $0.0001.

Warrants

In conjunction with the Company's initial public offering, the Company issued Public Warrants, Private Warrants and $15 Exercise Price Sponsor Warrants. The Company issued certain Merger Warrants and Additional Merger Warrants in conjunction with the Company's business combination with LHLLC in July 2016 (the “Business Combination”). On July 20, 2021, the Public Warrants, Private Warrants, and Additional Merger Warrants expired by their terms.

The following table summarizes the underlying shares of common stock with respect to outstanding warrants:

	March 31, 2022	December 31, 2021
$15 Exercise Price Sponsor Warrants(1)(2)	600,000	600,000
Merger Warrants(3)(4)	629,643	629,643
Total	1,229,643	1,229,643

(1)    Exercisable for one share of common stock at an exercise price of $15.00 per share (“$15 Exercise Price Sponsor Warrants”).

(2)    Issued under a warrant agreement dated July 15, 2014, between Continental Stock Transfer and Trust Company, as warrant agent, and the Company.

(3)    Exercisable for one share of common stock at an exercise price of $12.50 per share (“Merger Warrants”).

(4)    Issued to the sellers of LHLLC.

Incentive Plan

Upon the consummation of the Company's Business Combination, the Company adopted an omnibus incentive plan (the “Omnibus Incentive Plan”) for which all future equity awards will be granted thereunder.

On March 9, 2021, the Board of Directors approved certain amendments to the Company's Omnibus Incentive Plan (the “2021 Amended and Restated Omnibus Incentive Plan”) to increase the number of shares of the Company's common stock that may be issued pursuant to awards by 600,000, for a total of 2,250,000 shares, and extended the term of the plan so that it will expire on the tenth anniversary of the date the stockholders approve the 2021 Amended and Restated Omnibus Incentive Plan. The amendments were approved by the Company's stockholders at the Annual Meeting held on June 16, 2021.

See Note 14 for a discussion of the Company's management incentive plans for restricted stock units (“RSUs”) granted, vested, forfeited and remaining unvested.

Employee Stock Purchase Plan

Upon approval of the Company's stockholders on May 30, 2019, the Company adopted the Limbach Holdings, Inc. 2019 Employee Stock Purchase Plan (the “ESPP”). On January 1, 2020, the ESPP went into effect. The ESPP enables eligible employees, as defined by the ESPP, the right to purchase the Company's common stock through payroll deductions during consecutive subscription periods at a purchase price of 85% of the fair market value of a common share at the end of each offering period. Annual purchases by participants are limited to the number of whole shares that can be purchased by an amount equal to ten percent of the participant's compensation or $5,000, whichever is less. Each offering period of the ESPP lasts six months, commencing on January 1 and July 1 of each year. The amounts collected from participants during a subscription period are used on the exercise date to purchase full shares of common stock. Participants may withdraw from an offering before the exercise date and obtain a refund of amounts withheld through payroll deductions. Compensation cost, representing the 15% discount applied to the fair market value of common stock, is recognized on a straight-line basis over the six-month vesting period during which employees perform related services. Under the ESPP, 500,000 shares are authorized to be issued. In January 2022, the Company issued 12,898 shares of its common stock to participants in the ESPP who contributed to the plan during the offering period ending December 31, 2021. In January 2021, the Company issued a total of 8,928 shares of its common stock to participants in the ESPP who contributed to the plan during the offering period ending December 31, 2020. As of March 31, 2022, 431,209 shares remain available for future issuance under the ESPP.

2021 Public Offering

On February 10, 2021 the Company entered into an underwriting agreement (“Underwriting Agreement”) with Lake Street Capital Markets, LLC (“Underwriter”) relating to an underwritten public offering (the “2021 Public Offering”). On February 12, 2021, the Company sold to the Underwriter 1,783,500 shares of its Common Stock. The Underwriting Agreement provided for purchase and sale of the Shares by the company to the Underwriter at a price of $11.28 per share. The price to the public in the 2021 Public Offering was $12.00 per share. In addition, under the terms of the Underwriting Agreement, the Company granted the Underwriter a 30-day option to purchase up to an additional 267,525 shares of Common Stock to cover over-allotments, if any, on the same terms and conditions. The net proceeds to the Company from the 2021 Public Offering after deducting the underwriting discounts and commissions were approximately $19.8 million. On February 18, 2021, the Company received approximately $3.0 million of net proceeds for the sale of 267,525 shares in connection with the exercise of the over-allotment option.

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Fair Value Measurements

3 Months Ended

Mar. 31, 2022

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

The Company measures the fair value of financial assets and liabilities in accordance with ASC Topic 820 – Fair Value Measurements and Disclosures, which defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. ASC Topic 820 establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value and requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to measurements involving significant unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are as follows:

•Level 1 — inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that are accessible at the measurement date;

•Level 2 — inputs other than quoted prices included in Level 1 that are observable for the asset or liability either directly or indirectly such as quoted prices in active markets for similar assets and liabilities, quoted prices for identical or similar assets or liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of assets or liabilities; and

•Level 3 — unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions.

The Company believes that the carrying amounts of its financial instruments, including cash and cash equivalents, trade accounts receivable and accounts payable, consist primarily of instruments without extended maturities, which approximate fair value primarily due to their short-term maturities and low risk of counterparty default. The Company also believes that the carrying values of the A&R Wintrust Term Loan and the A&R Wintrust Revolving Loan approximate their respective fair values due to the variable rates on such debt. As of March 31, 2022, the Company determined that the fair value of the A&R Wintrust Term Loan was $33.0 million and the A&R Wintrust Revolving Loan was $9.4 million. Such fair value was determined using discounted estimated future cash flows using level 3 inputs.

As a part of the total consideration for the Jake Marshall Transaction, the Company recognized $3.1 million in contingent consideration, of which the entire balance was included in other long-term liabilities in the Company’s condensed consolidated balance sheet as of March 31, 2022. The Company determined the initial fair value of the Earnout Payments based on the Monte Carlo Simulation method, which represented a Level 3 measurement. As of the Effective Date, the Earnout Payments associated with the Jake Marshall Transaction were valued utilizing a discount rate of 6.83%. The discount rate was calculated using the build-up method with a risk-free rate commensurate with the term of the Earnout Payments based on the U.S. Treasury Constant Maturity Yield. Subsequent to the Effective Date, the Earnout Payments are re-measured at fair value each reporting period. No changes in the estimated fair value of the contingent payments were recognized during the three months ended March 31, 2022.

Prior to its termination as a result of the 2021 Refinancing, the Company's CB Warrants were determined using the Black-Scholes-Merton option pricing model. The valuation inputs included the quoted price of the Company’s common stock in an active market, volatility and expected life of the warrants, which were considered Level 3 inputs. The CB Warrants liability was included in other long-term liabilities on the Company's Condensed Consolidated Balance Sheets. The Company remeasured the fair value of the CB Warrants liability as of February 24, 2021 and recorded any adjustments to other income (expense). At February 24, 2021, the CB Warrants liability was $2.0 million. Due to the extinguishment of the CB Warrants on the 2021 Refinancing Date, there was no liability associated with the CB Warrants recorded as of March 31, 2021. For the period from January 1, 2021 through the 2021 Refinancing Date, the Company recorded other income of $14 thousand to reflect the change in the CB Warrants liability.

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Earnings per Share

3 Months Ended

Mar. 31, 2022

Earnings Per Share [Abstract]

Earnings per Share

Earnings per Share

Earnings per Share

The Company calculates earnings per share in accordance with ASC Topic 260 - Earnings Per Share (“EPS”). Basic earnings per common share applicable to common stockholders is computed by dividing earnings applicable to common stockholders by the weighted-average number of common shares outstanding and assumed to be outstanding. Diluted EPS assumes the dilutive effect of outstanding common stock warrants, shares issued in conjunction with the Company’s ESPP and RSUs, all using the treasury stock method.

The following table sets forth the computation of the basic and diluted earnings per share attributable to the Company's common shareholders for the three months ended March 31, 2022 and 2021:

	Three Months Ended March 31,
(in thousands, except per share amounts)	2022		2021
EPS numerator:
Net loss	$	(1,516)	$	(2,282)
EPS denominator:
Weighted average shares outstanding – basic	10,421		9,218
Impact of dilutive securities(1)	—		—
Weighted average shares outstanding – diluted	10,421		9,218
EPS:
Basic	$	(0.15)	$	(0.25)
Diluted	$	(0.15)	$	(0.25)

(1)    For the three months ended March 31, 2022 and 2021, the Company excluded 153,741 and 603,847, respectively, of weighted average anti-dilutive securities related to certain of the Company's outstanding common stock warrants, shares issued in conjunction with the Company's ESPP and nonvested RSUs.

The following table summarizes the securities that were antidilutive or out-of-the-money, and therefore, were not included in the computations of diluted income per common share:

	Three Months Ended March 31,
	2022	2021
In-the-money warrants	—	365,556
Out-of-the-money warrants (see Note 7)	1,229,643	600,000
Service-based RSUs (See Note 14)	70,999	143,647
Performance and market-based RSUs(1)	87,053	90,729
Employee Stock Purchase Plan	3,547	3,627
Total	1,391,242	1,203,559

(1)    For the three months ended March 31, 2022 and 2021, certain PRSU and MRSU awards (each defined in Note 14) were not included in the computation of diluted income per common share because the performance and market conditions were not satisfied during the periods and would not be satisfied if the reporting date was at the end of the contingency period.

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Income Taxes

3 Months Ended

Mar. 31, 2022

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The Company is taxed as a C corporation.

For interim periods, the provision for income taxes (including federal, state, local and foreign taxes) is calculated based on the estimated annual effective tax rate, adjusted for certain discrete items for the full fiscal year. Cumulative adjustments to the Company's estimate are recorded in the interim period in which a change in the estimated annual effective rate is determined. Each quarter the Company updates its estimate of the annual effective tax rate, and if its estimated tax rate changes, the Company makes a cumulative adjustment.

The Company had an effective tax benefit rate of 28.9% and 31.2% for the three months ended March 31, 2022 and 2021, respectively. The decrease in the effective tax benefit rate was the result of certain discrete tax items. During the three months ended March 31, 2022 and 2021, the Company recorded discrete tax items of approximately $0.1 million and $0.2 million, respectively, related to excess tax benefits associated with stock based compensation.

No valuation allowance was required as of March 31, 2022 or December 31, 2021.

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Operating Segments

3 Months Ended

Mar. 31, 2022

Segment Reporting [Abstract]

Operating Segments

Operating Segments

As discussed in Note 1, the Company operates in two segments, (i) GCR, in which the Company generally manages new construction or renovation projects that involve primarily HVAC, plumbing, or electrical services awarded to the Company by general contractors or construction managers, and (ii) ODR, in which the Company provides maintenance or service primarily on HVAC, plumbing or electrical systems, building controls and specialty contracting projects direct to, or assigned by, building owners or property managers. These segments are reflective of how the Company’s Chief Operating Decision Maker (“CODM”) reviews operating results for the purposes of allocating resources and assessing performance. The Company's CODM is comprised of its Chief Executive Officer, Chief Financial Officer and Chief Operating Officer.

The CODM evaluates performance based on income from operations of the respective branches after the allocation of Corporate office operating expenses. In accordance with ASC Topic 280 – Segment Reporting, the Company has elected to aggregate all of the construction branches into one GCR reportable segment and all of the service branches into one ODR reportable segment. All transactions between segments are eliminated in consolidation. The Company's corporate department provides general and administrative support services to its two operating segments. The CODM allocates costs between segments for selling, general and administrative expenses and depreciation expense.

All of the Company’s identifiable assets are located in the United States, which is where the Company is domiciled. Interest expense is not allocated to segments because of the corporate management of debt service including interest.

Condensed consolidated segment information for the three months ended March 31, 2022 and 2021 were as follows:

	Three months ended March 31,
(in thousands)	2022		2021
Statement of Operations Data:
Revenue:
GCR	$	71,932	$	84,804
ODR	42,890		28,540
Total revenue	114,822		113,344
Gross profit:
GCR	8,358		9,395
ODR	9,982		7,834
Total gross profit	18,340		17,229
Selling, general and administrative:
GCR	8,565		9,114
ODR	9,570		7,354
Corporate	599		677
Total selling, general and administrative	18,734		17,145
Amortization of intangibles	399		104
Operating loss	$	(793)	$	(20)
Less unallocated amounts:
Interest expense, net	(486)		(1,264)
Loss on disposition of property and equipment	(36)		(86)
Loss on early termination of operating lease	(817)		—
Loss on early debt extinguishment	—		(1,961)
Gain on change in fair value of warrant liability	—		14
Total unallocated amounts	(1,339)		(3,297)
Loss before income taxes	$	(2,132)	$	(3,317)
Other Data:
Depreciation and amortization:
GCR	$	1,108	$	1,036
ODR	555		355
Corporate	399		104
Total other data	$	2,062	$	1,495

The Company does not identify capital expenditures and total assets by segment in its internal financial reports due in part to the shared use of a centralized fleet of vehicles and specialized equipment. Interest expense is also not allocated to segments because of the Company’s corporate management of debt service, including interest.

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Leases

3 Months Ended

Mar. 31, 2022

Leases [Abstract]

Leases

Leases

The Company leases real estate, trucks and other equipment. The determination of whether an arrangement is, or contains, a lease is performed at the inception of the arrangement. Classification and initial measurement of the right-of-use asset and lease liability are determined at the lease commencement date. The Company elected the short-term lease measurement and recognition exemption; therefore, leases with an initial term of 12 months or less are not recorded on the condensed consolidated balance sheets. Instead, the short-term leases are recognized in expense on a straight-line basis over the lease term.

The Company's arrangements include certain non-lease components such as common area and other maintenance for leased real estate, as well as mileage, fuel and maintenance costs related to leased vehicles. For all leased asset classes, the Company has elected to not separate non-lease components from lease components and will account for each separate lease component and

non-lease component associated with the lease as a single lease component. The Company does not guarantee any residual value in its lease agreements, and there are no material restrictions or covenants imposed by lease arrangements. Real estate leases typically include one or more options to extend the lease. The Company regularly evaluates the renewal options, and when they are reasonably certain of exercise, the Company includes the renewal period in its lease term. For the Company's leased vehicles, the Company uses the interest rate implicit in its leases with the lessor to discount lease payments at the lease commencement date. When the implicit rate is not readily available, as is the case with the Company's real estate leases, the Company uses quoted borrowing rates on its secured debt.

Related Party Lease Agreement. In conjunction with the closing of the Jake Marshall Transaction, the Company entered into an operating lease for certain land and facilities owned by a former member of JMLLC who became a full-time employee of the Company. The lease term is 10 years and includes an option to extend the lease for two successive periods of 2 years each through November 2035. Base rent for the term of the lease is $37,500 per month for the first five years with payment commencing on January 1, 2022. The fixed rent payment is escalated to $45,000 per month for years 6 through 10 of the lease term. Fixed rent payments for the extension term shall be increased from $45,000 by the percentage increase, if any, in the consumer price index from the lease commencement date. In addition, under the agreement, the Company is required to pay its share of estimated property taxes and operating expenses, both of which are variable lease expenses.

Southern California Sublease. In June, 2021, the Company entered into a sublease agreement with a third party for the entire ground floor of its leased space in Southern California, consisting of 71,787 square feet. Under the terms of the sublease agreement, the sublessee is obligated to pay the Company base rent of approximately $0.6 million per year, which is subject to a 3.0% annual rent increase, plus certain operating expenses and other costs. The initial lease term commenced in September 2021 and continues through April 30, 2027. As of March 31, 2022, the Company remains obligated under the original lease for such office space and, in the event the subtenant of such office space fails to satisfy its obligations under the sublease, the Company would be required to satisfy its obligations directly to the landlord under such original lease.

In addition, during the first quarter of 2022, the Company entered into an amendment to the aforementioned sublease agreement, which, among other things, expanded the sublease premises to include the entire second floor of its leased space in Southern California, consisting of 16,720 square feet. Under the terms of the amended sublease agreement, the sublessee is obligated to pay the Company base rent of approximately $0.8 million per year, which is subject to a 3.0% annual rent increase, plus certain operating expenses and other costs. The amended sublease term commenced in March 2022 and continues through April 30, 2027. For the three months ended March 31, 2022, the Company recorded approximately $0.2 million of income in selling, general and administrative expenses related to this sublease agreement.

Pittsburgh Lease Termination. In March, 2022, the Company entered into a lease termination agreement (the “Lease Termination Agreement”) to terminate, effective March 31, 2022, the lease associated with the Company’s office space located in Pittsburgh, Pennsylvania, which previously served as its corporate headquarters. Absent the Lease Termination Agreement, the lease would have expired in accordance with its terms in July 2025. Pursuant to the Lease Termination Agreement, in exchange for allowing the Company to terminate the lease early, the Company agreed to pay a termination fee in the aggregate of approximately $0.7 million in 16 equal monthly installments commencing on April 1, 2022.

In connection with the lease termination, the Company recognized a gain of $0.1 million associated with the derecognition of the operating lease right-of-use asset and corresponding operating lease liabilities associated with the operating lease and recorded a $0.1 million loss on the disposal of leasehold improvements.

The following table summarizes the lease amounts included in the Company's condensed consolidated balance sheets:

(in thousands)	Classification on the Condensed Consolidated Balance Sheets	March 31, 2022		December 31, 2021
Assets
Operating	Operating lease right-of-use assets(1)	$	17,719	$	20,119
Finance	Property and equipment, net(2)	5,111		4,916
Total lease assets		$	22,830	$	25,035
Liabilities
Current
Operating	Current operating lease liabilities	$	3,762	$	4,366
Finance	Current portion of long-term debt	2,458		2,451
Noncurrent
Operating	Long-term operating lease liabilities	14,787		16,576
Finance	Long-term debt	2,859		2,681
Total lease liabilities		$	23,866	$	26,074

(1)     Operating lease assets are recorded net of accumulated amortization of $15.6 million at March 31, 2022 and $15.9 million at December 31, 2021.

(2)    Finance lease assets are recorded net of accumulated amortization of $6.4 million at March 31, 2022 and $5.9 million at December 31, 2021.

The following table summarizes the lease costs included in the Company's condensed consolidated statements of operations for the three months ended March 31, 2022 and 2021:

		Three Months Ended March 31,
(in thousands)	Classification on the Condensed Consolidated Statement of Operations	2022		2021
Operating lease cost	Cost of revenue(1)	$	694	$	690
Operating lease cost	Selling, general and administrative(1)	704		584
Finance lease cost
Amortization	Cost of revenue(2)	651		674
Interest	Interest expense, net(2)	66		86
Total lease cost		$	2,115	$	2,034

(1)    Operating lease costs recorded in cost of revenue included $0.1 million of variable lease costs for both the three months ended March 31, 2022 and 2021. In addition, $0.1 million of variable lease costs are included in selling, general and administrative for both the three months ended March 31, 2022 and 2021. These variable costs consist of the Company's proportionate share of operating expenses, real estate taxes and utilities.

(2)     Finance lease costs recorded in cost of revenue include variable lease costs of $0.8 million for the three months ended March 31, 2022 and $0.6 million for the three months ended March 31, 2021. These variable lease costs consist of fuel, maintenance, and sales tax charges.

Future minimum commitments for finance and operating leases that have non-cancelable lease terms in excess of one year as of March 31, 2022 were as follows:

			Operating Leases
Year ending (in thousands):	Finance Leases		Non-Related Party		Related Party(1)		Sublease Receipts(2)		Total Operating
Remainder of 2022	$	1,934	$	3,252	$	338	$	(623)	$	2,967
2023	1,758		3,108		450		(885)		2,673
2024	1,026		2,502		450		(912)		2,040
2025	500		2,148		450		(939)		1,659
2026	99		2,010		450		(967)		1,493
Thereafter	—		2,033		4,815		(327)		6,521
Total minimum lease payments	$	5,317	$	15,053	$	6,953	$	(4,653)	$	17,353
Amounts representing interest	358
Present value of net minimum lease payments	$	5,675

(1)    Associated with the aforementioned related party lease entered into with a former member of JMLLC.

(2)    Associated with the aforementioned third party sublease.

The following is a summary of the lease terms and discount rates:

	March 31, 2022		December 31, 2021
Weighted average lease term (in years):
Operating	7.30		7.10
Finance	2.60		2.51
Weighted average discount rate:
Operating	4.67	%	4.68	%
Finance	5.14	%	5.27	%

The following is a summary of other information and supplemental cash flow information related to finance and operating leases:

	Three months ended March 31,
(in thousands)	2022		2021
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	1,358	$	1,225
Operating cash flows from finance leases	66		86
Financing cash flows from finance leases	660		667
Right-of-use assets exchanged for lease liabilities:
Operating leases	—		156
Finance leases	864		87
Right-of-use assets disposed or adjusted modifying operating leases liabilities	(1,276)		36
Right-of-use assets disposed or adjusted modifying finance leases liabilities	$	(19)	—

Leases

Leases

The Company leases real estate, trucks and other equipment. The determination of whether an arrangement is, or contains, a lease is performed at the inception of the arrangement. Classification and initial measurement of the right-of-use asset and lease liability are determined at the lease commencement date. The Company elected the short-term lease measurement and recognition exemption; therefore, leases with an initial term of 12 months or less are not recorded on the condensed consolidated balance sheets. Instead, the short-term leases are recognized in expense on a straight-line basis over the lease term.

The Company's arrangements include certain non-lease components such as common area and other maintenance for leased real estate, as well as mileage, fuel and maintenance costs related to leased vehicles. For all leased asset classes, the Company has elected to not separate non-lease components from lease components and will account for each separate lease component and

non-lease component associated with the lease as a single lease component. The Company does not guarantee any residual value in its lease agreements, and there are no material restrictions or covenants imposed by lease arrangements. Real estate leases typically include one or more options to extend the lease. The Company regularly evaluates the renewal options, and when they are reasonably certain of exercise, the Company includes the renewal period in its lease term. For the Company's leased vehicles, the Company uses the interest rate implicit in its leases with the lessor to discount lease payments at the lease commencement date. When the implicit rate is not readily available, as is the case with the Company's real estate leases, the Company uses quoted borrowing rates on its secured debt.

Related Party Lease Agreement. In conjunction with the closing of the Jake Marshall Transaction, the Company entered into an operating lease for certain land and facilities owned by a former member of JMLLC who became a full-time employee of the Company. The lease term is 10 years and includes an option to extend the lease for two successive periods of 2 years each through November 2035. Base rent for the term of the lease is $37,500 per month for the first five years with payment commencing on January 1, 2022. The fixed rent payment is escalated to $45,000 per month for years 6 through 10 of the lease term. Fixed rent payments for the extension term shall be increased from $45,000 by the percentage increase, if any, in the consumer price index from the lease commencement date. In addition, under the agreement, the Company is required to pay its share of estimated property taxes and operating expenses, both of which are variable lease expenses.

Southern California Sublease. In June, 2021, the Company entered into a sublease agreement with a third party for the entire ground floor of its leased space in Southern California, consisting of 71,787 square feet. Under the terms of the sublease agreement, the sublessee is obligated to pay the Company base rent of approximately $0.6 million per year, which is subject to a 3.0% annual rent increase, plus certain operating expenses and other costs. The initial lease term commenced in September 2021 and continues through April 30, 2027. As of March 31, 2022, the Company remains obligated under the original lease for such office space and, in the event the subtenant of such office space fails to satisfy its obligations under the sublease, the Company would be required to satisfy its obligations directly to the landlord under such original lease.

In addition, during the first quarter of 2022, the Company entered into an amendment to the aforementioned sublease agreement, which, among other things, expanded the sublease premises to include the entire second floor of its leased space in Southern California, consisting of 16,720 square feet. Under the terms of the amended sublease agreement, the sublessee is obligated to pay the Company base rent of approximately $0.8 million per year, which is subject to a 3.0% annual rent increase, plus certain operating expenses and other costs. The amended sublease term commenced in March 2022 and continues through April 30, 2027. For the three months ended March 31, 2022, the Company recorded approximately $0.2 million of income in selling, general and administrative expenses related to this sublease agreement.

Pittsburgh Lease Termination. In March, 2022, the Company entered into a lease termination agreement (the “Lease Termination Agreement”) to terminate, effective March 31, 2022, the lease associated with the Company’s office space located in Pittsburgh, Pennsylvania, which previously served as its corporate headquarters. Absent the Lease Termination Agreement, the lease would have expired in accordance with its terms in July 2025. Pursuant to the Lease Termination Agreement, in exchange for allowing the Company to terminate the lease early, the Company agreed to pay a termination fee in the aggregate of approximately $0.7 million in 16 equal monthly installments commencing on April 1, 2022.

In connection with the lease termination, the Company recognized a gain of $0.1 million associated with the derecognition of the operating lease right-of-use asset and corresponding operating lease liabilities associated with the operating lease and recorded a $0.1 million loss on the disposal of leasehold improvements.

The following table summarizes the lease amounts included in the Company's condensed consolidated balance sheets:

(in thousands)	Classification on the Condensed Consolidated Balance Sheets	March 31, 2022		December 31, 2021
Assets
Operating	Operating lease right-of-use assets(1)	$	17,719	$	20,119
Finance	Property and equipment, net(2)	5,111		4,916
Total lease assets		$	22,830	$	25,035
Liabilities
Current
Operating	Current operating lease liabilities	$	3,762	$	4,366
Finance	Current portion of long-term debt	2,458		2,451
Noncurrent
Operating	Long-term operating lease liabilities	14,787		16,576
Finance	Long-term debt	2,859		2,681
Total lease liabilities		$	23,866	$	26,074

(1)     Operating lease assets are recorded net of accumulated amortization of $15.6 million at March 31, 2022 and $15.9 million at December 31, 2021.

(2)    Finance lease assets are recorded net of accumulated amortization of $6.4 million at March 31, 2022 and $5.9 million at December 31, 2021.

The following table summarizes the lease costs included in the Company's condensed consolidated statements of operations for the three months ended March 31, 2022 and 2021:

		Three Months Ended March 31,
(in thousands)	Classification on the Condensed Consolidated Statement of Operations	2022		2021
Operating lease cost	Cost of revenue(1)	$	694	$	690
Operating lease cost	Selling, general and administrative(1)	704		584
Finance lease cost
Amortization	Cost of revenue(2)	651		674
Interest	Interest expense, net(2)	66		86
Total lease cost		$	2,115	$	2,034

(1)    Operating lease costs recorded in cost of revenue included $0.1 million of variable lease costs for both the three months ended March 31, 2022 and 2021. In addition, $0.1 million of variable lease costs are included in selling, general and administrative for both the three months ended March 31, 2022 and 2021. These variable costs consist of the Company's proportionate share of operating expenses, real estate taxes and utilities.

(2)     Finance lease costs recorded in cost of revenue include variable lease costs of $0.8 million for the three months ended March 31, 2022 and $0.6 million for the three months ended March 31, 2021. These variable lease costs consist of fuel, maintenance, and sales tax charges.

Future minimum commitments for finance and operating leases that have non-cancelable lease terms in excess of one year as of March 31, 2022 were as follows:

			Operating Leases
Year ending (in thousands):	Finance Leases		Non-Related Party		Related Party(1)		Sublease Receipts(2)		Total Operating
Remainder of 2022	$	1,934	$	3,252	$	338	$	(623)	$	2,967
2023	1,758		3,108		450		(885)		2,673
2024	1,026		2,502		450		(912)		2,040
2025	500		2,148		450		(939)		1,659
2026	99		2,010		450		(967)		1,493
Thereafter	—		2,033		4,815		(327)		6,521
Total minimum lease payments	$	5,317	$	15,053	$	6,953	$	(4,653)	$	17,353
Amounts representing interest	358
Present value of net minimum lease payments	$	5,675

(1)    Associated with the aforementioned related party lease entered into with a former member of JMLLC.

(2)    Associated with the aforementioned third party sublease.

The following is a summary of the lease terms and discount rates:

	March 31, 2022		December 31, 2021
Weighted average lease term (in years):
Operating	7.30		7.10
Finance	2.60		2.51
Weighted average discount rate:
Operating	4.67	%	4.68	%
Finance	5.14	%	5.27	%

The following is a summary of other information and supplemental cash flow information related to finance and operating leases:

	Three months ended March 31,
(in thousands)	2022		2021
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	1,358	$	1,225
Operating cash flows from finance leases	66		86
Financing cash flows from finance leases	660		667
Right-of-use assets exchanged for lease liabilities:
Operating leases	—		156
Finance leases	864		87
Right-of-use assets disposed or adjusted modifying operating leases liabilities	(1,276)		36
Right-of-use assets disposed or adjusted modifying finance leases liabilities	$	(19)	—

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2022

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Legal. The Company is continually engaged in administrative proceedings, arbitrations, and litigation with owners, general contractors, suppliers, and other unrelated parties, all arising in the ordinary courses of business. The ultimate resolution of these contingencies could, individually or in the aggregate, be material to the condensed consolidated financial statements. In the opinion of the Company’s management, the current belief is that the results of these actions will not have a material adverse effect on the financial position, results of operations, or cash flows of the Company.

On January 23, 2020, plaintiff, Bernards Bros. Inc. (“Bernards”), filed a complaint against the Company in Superior Court of the State of California for the County of Los Angeles. The complaint alleges that the Company's Southern California operations refused to honor a proposal made to Bernards to act as a subcontractor on a construction project, and that, as a result of the

wrongful failure to honor the proposal, Bernards suffered damages in excess of $3.0 million, including alleged increased costs for hiring a different subcontractor to perform the work. The Company is vigorously defending the suit. A non-binding mediation took place on August 19, 2021 that did not result in a settlement. Per the agreement of the Company and Bernards, in January 2022, the Court appointed a private referee to manage the case and adjudicate the dispute. A trial date before the private referee is pending scheduling. The Company believes that a loss is neither probable nor reasonably estimable for this matter, and, as such, has not recorded a loss contingency.

On April 17, 2020, plaintiff, LA Excavating, Inc., filed a complaint against the Company's wholly-owned subsidiary, Limbach Company LP, and several other parties, in Superior Court of the State of California, for the County of Los Angeles. The complaint seeks damages of approximately $1.0 million for alleged failure to pay contract balances and extra work ordered by Limbach Company LP, as well as seeks to enforce payment obligations under a payment bond. The Company disputes the allegations and intends to vigorously defend the suit, which is currently set for mediation on May 11, 2022 and trial beginning on February 7, 2023. The Company believes that a loss is neither probable nor reasonably estimable for this matter, and, as such, has not recorded a loss contingency.

On January 26, 2022, claimant, Suffolk Construction Company, Inc. (“Suffolk”) filed a Demand for Arbitration in Massachusetts against Boston Medical Center Corporation (“BMC”) and numerous of Suffolk’s trade subcontractors, including, the Company’s wholly-owned subsidiary, Limbach Company LLC, seeking to recover monies BMC withheld from Suffolk and its subcontractors based on an audit of project billings. Suffolk has demanded the Company defend and indemnify Suffolk against BMC’s audit findings that the Company overbilled the project just over $0.3 million and for the Company’s share of BMC’s audit costs, which share has not been, and cannot currently be, quantified. The Company disputes the findings of BMC’s audit and intends to vigorously defend the allegation that it overbilled the project. A final arbitration hearing has not been scheduled. The Company believes that a loss is neither probable nor reasonably estimable for this matter, and, as such, has not recorded a loss contingency.

Surety. The terms of its construction contracts frequently require that the Company obtain from surety companies, and provide to its customers, payment and performance bonds (“Surety Bonds”) as a condition to the award of such contracts. The Surety Bonds secure its payment and performance obligations under such contracts, and the Company has agreed to indemnify the surety companies for amounts, if any, paid by them in respect of Surety Bonds issued on its behalf. In addition, at the request of labor unions representing certain of the Company's employees, Surety Bonds are sometimes provided to secure obligations for wages and benefits payable to or for such employees. Public sector contracts require Surety Bonds more frequently than private sector contracts, and accordingly, the Company's bonding requirements typically increase as the amount of public sector work increases. As of March 31, 2022, the Company had approximately $134.9 million in surety bonds outstanding. The Surety Bonds are issued by surety companies in return for premiums, which vary depending on the size and type of bond.

Collective Bargaining Agreements. Many of the Company’s craft labor employees are covered by collective bargaining agreements. The agreements require the Company to pay specified wages, provide certain benefits and contribute certain amounts to multi-employer pension plans. If the Company withdraws from any of the multi-employer pension plans or if the plans were to otherwise become underfunded, the Company could incur additional liabilities related to these plans. Although the Company has been informed that some of the multi-employer pension plans to which it contributes have been classified as “critical” status, the Company is not currently aware of any significant liabilities related to this issue.

Self-insurance. The Company is substantially self-insured for workers’ compensation and general liability claims, in the view of the relatively high per-incident deductibles the Company absorbs under its insurance arrangements for these risks. The Company purchases workers’ compensation and general liability insurance under policies with per-incident deductibles of $250,000 per occurrence and a $4.4 million maximum aggregate deductible loss limit per year. Losses incurred over primary policy limits are covered by umbrella and excess policies up to specified limits with multiple excess insurers. The Company accrues for the unfunded portion of costs for both reported claims and claims incurred but not reported. The liability for unfunded reported claims and future claims is reflected on the consolidated balance sheets as current and non-current liabilities. The liability is determined by determining a reserve for each reported claim on a case-by-case basis based on the nature of the claim and historical loss experience for similar claims plus an allowance for the cost of incurred but not reported claims. The current portion of the liability is included in accrued expenses and other current liabilities on the consolidated balance sheet. The non-current portion of the liability is included in other long-term liabilities on the consolidated balance sheet.

The Company is self-insured related to medical and dental claims under policies with annual per-claimant and annual aggregate stop-loss limits. The Company accrues for the unfunded portion of costs for both reported claims and claims incurred but not reported. The liability for unfunded reported claims and future claims is reflected on the consolidated balance sheets as a current liability in accrued expenses and other current liabilities.

The components of the self-insurance liability as of March 31, 2022 and December 31, 2021 are as follows:

(in thousands)	March 31, 2022		December 31, 2021
Current liability — workers’ compensation and general liability	$	173	$	184
Current liability — medical and dental	373		456
Non-current liability	447		451
Total liability	$	993	$	1,091
Restricted cash	$	113	$	113

The restricted cash balance represents an imprest cash balance set aside for the funding of workers' compensation and general liability insurance claims. This amount is replenished either when depleted or at the beginning of each month.

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Management Incentive Plans

3 Months Ended

Mar. 31, 2022

Share-based Payment Arrangement [Abstract]

Management Incentive Plans

Management Incentive Plans

The Company initially adopted the Omnibus Incentive Plan on July 20, 2016 for the purpose of: (a) encouraging the profitability and growth of the Company through short-term and long-term incentives that are consistent with the Company’s objectives; (b) giving participants an incentive for excellence in individual performance; (c) promoting teamwork among participants; and (d) giving the Company a significant advantage in attracting and retaining key employees, directors and consultants. To accomplish such purposes, the Omnibus Incentive Plan, and such subsequent amendments to the Omnibus Incentive Plan, provides that the Company may grant options, stock appreciation rights, restricted shares, RSUs, performance-based awards (including performance-based restricted shares and restricted stock units), other share based awards, other cash-based awards or any combination of the foregoing.

Following the approval of the 2021 Amended and Restated Omnibus Incentive Plan, the Company has reserved 2,250,000 shares of its common stock for issuance. The number of shares issued or reserved pursuant to the Omnibus Incentive Plan will be adjusted by the plan administrator, as they deem appropriate and equitable, as a result of stock splits, stock dividends, and similar changes in the Company’s common stock. In connection with the grant of an award, the plan administrator may provide for the treatment of such award in the event of a change in control. All awards are made in the form of shares only.

Service-Based Awards

The Company grants service-based stock awards in the form of RSUs. Service-based RSUs granted to executives, employees, and non-employee directors vest ratably, on an annual basis, over three years and in the case of certain awards to non-employee directors, one year. The grant date fair value of the service-based awards was equal to the closing market price of the Company’s common stock on the date of grant.

The following table summarizes the Company's service-based RSU activity for the three months ended March 31, 2022:

	Awards	Weighted-Average Grant Date Fair Value
Unvested at December 31, 2021	266,089	$	8.45
Granted	180,739	9.00
Vested	(120,401)	7.43
Forfeited	(10,958)	9.29
Unvested at March 31, 2022	315,469	$	9.13

Performance-Based Awards

The Company grants performance-based restricted stock units (“PRSUs”) under which shares of the Company’s common stock may be earned based on the Company’s performance compared to defined metrics. The number of shares earned under a performance award may vary from zero to 150% of the target shares awarded, based upon the Company’s performance compared to the metrics. The metrics used for the grant are determined by the Company’s Compensation Committee of the Board of Directors and are based on internal measures such as the achievement of certain predetermined adjusted EBITDA, EPS growth and EBITDA margin performance goals over a three year period.

The Company recognizes stock-based compensation expense for these awards over the vesting period based on the projected probability of achievement of the performance conditions as of the end of each reporting period during the performance period and may periodically adjust the recognition of such expense, as necessary, in response to any changes in the Company’s

forecasts with respect to the performance conditions. For both the three months ended March 31, 2022 and 2021, the Company recognized $0.2 million of stock-based compensation expense related to outstanding PRSUs.

The following table summarizes the Company's PRSU activity for the three months ended March 31, 2022:

	Awards	Weighted-Average Grant Date Fair Value
Unvested at December 31, 2021	280,700	$	9.46
Granted	249,885	7.17
Vested	—	—
Forfeited	(6,500)	9.04
Unvested at March 31, 2022	524,085	$	8.38

Market-Based Awards

The following table summarizes the Company's market-based RSU (“MRSUs”) activity for the three months ended March 31, 2022:

	Awards	Weighted-Average Grant Date Fair Value
Unvested at December 31, 2021	102,500	$	8.26
Granted	—	—
Vested	—	—
Forfeited	—	—
Unvested at March 31, 2022	102,500	$	8.26

The vesting of the MRSUs is contingent upon the Company’s closing price of a share of the Company's common stock on the Nasdaq Capital market, or such other applicable principal securities exchange or quotation system, achieving at least $18.00 over a period of eighty (80) consecutive trading days during the three-year period commencing on August 1, 2018 and concluding on July 31, 2021. On September 4, 2020, the Compensation Committee of the Board of Directors of the Company approved an amendment to extend the measurement period to July 16, 2022.

Total recognized stock-based compensation expense amounted to $0.6 million and $0.7 million for the three months ended March 31, 2022 and 2021, respectively. The aggregate fair value as of the vest date of RSUs that vested during the three months ended March 31, 2022 and 2021 was $1.1 million and $1.3 million, respectively. Total unrecognized stock-based compensation expense related to unvested RSUs which are probable of vesting was $5.0 million at March 31, 2022. These costs are expected to be recognized over a weighted average period of 1.97 years.

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Subsequent Events	3 Months Ended
	Mar. 31, 2022
Subsequent Events [Abstract]
Subsequent Events	Subsequent EventsOn May 5, 2022, the Company, LFS and LHLLC entered into a first amendment and waiver to the A&R Wintrust Credit Agreement (the “First Amendment to the A&R Wintrust Credit Agreement”) with the lenders party thereto and Wintrust, as administrative agent. The First Amendment to the A&R Wintrust Credit Agreement modifies certain definitions within the A&R Wintrust Credit Agreement, and make other corresponding changes, including: (i) the definition of EBITDA to allow for the recognition of certain restructuring charges and lease breakage costs not previously specified, (ii) the definition of Excess Cash Flow to exclude the aggregate amount of the Earnout Payments paid in cash, (iii) the definition of Total Funded Debt to exclude certain capitalized lease obligations for real estate based on the approval of each lender and (iv) the definition of Disposition to include a clause for the sale and leaseback of certain real property based on the approval of each lender.

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Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2022

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

References in these financial statements to the Company refer collectively to the accounts of Limbach Holdings, Inc. and its wholly-owned subsidiaries, including LHLLC, Limbach Facility Services LLC (“LFS”), Limbach Company LLC, Limbach Company LP, Harper Limbach LLC, Harper Limbach Construction LLC, Limbach Facility & Project Solutions LLC, Jake Marshall, LLC (“JMLLC”) and Coating Solutions, LLC (“CSLLC”) for all periods presented, unless otherwise indicated. All intercompany balances and transactions have been eliminated.

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) for interim financial information and with the requirements of Form 10-Q and Rule 8-03 of Regulation S-X for smaller reporting companies. Consequently, certain information and note disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to those rules and regulations, although the Company believes that the disclosures made are adequate to make the information not misleading. Readers of this report should refer to the consolidated financial statements and the notes thereto included in the Company's most recent Annual Report on Form 10-K filed with the Securities and Exchange Commission (“SEC”) on March 16, 2022.

Use of Estimates

Use of Estimates

The preparation of the condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements for assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, the reported amounts of revenue and expenses during the reported period, and the accompanying notes. Management believes that its most significant estimates and assumptions have been based on reasonable and supportable assumptions and the resulting estimates are reasonable for use in the preparation of the condensed consolidated financial statements. The Company’s significant estimates include estimates associated with revenue recognition on construction contracts, costs incurred through each balance sheet date, intangibles, property and equipment, fair value accounting for acquisitions, insurance reserves and contingencies. If the underlying estimates and assumptions upon which the condensed consolidated financial statements are based change in the future, actual amounts may differ from those included in the accompanying condensed consolidated financial statements.

Unaudited Interim Financial Information

Unaudited Interim Financial Information

The accompanying interim Condensed Consolidated Balance Sheets, Condensed Consolidated Statements of Operations, Condensed Consolidated Statements of Stockholders’ Equity and Condensed Consolidated Statements of Cash Flows for the periods presented are unaudited. Also, within the notes to the condensed consolidated financial statements, the Company has included unaudited information for these interim periods. These unaudited interim condensed consolidated financial statements

have been prepared in accordance with GAAP. In the Company's opinion, the accompanying unaudited condensed consolidated financial statements contain all normal and recurring adjustments necessary for a fair statement of the Company’s financial position as of March 31, 2022, its results of operations and its cash flows for the three months ended March 31, 2022. The results for the three months ended March 31, 2022 are not necessarily indicative of the results to be expected for the year ending December 31, 2022.

The Condensed Consolidated Balance Sheet as of December 31, 2021 was derived from the Company's audited financial statements included in its Annual Report on Form 10-K filed with the SEC on March 16, 2022, but is presented as condensed and does not contain all of the footnote disclosures from the annual financial statements.

Recently Adopted Accounting Standards and Recent Accounting Pronouncements

Recently Adopted Accounting Standards

In November 2021, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers, which creates an exception to the general recognition and measurement principle for contract assets and contract liabilities from contracts with customers acquired in a business combination. Under this exception, an acquirer applies ASC 606, Revenue from Contracts with Customers, to recognize and measure contract assets and contract liabilities on the acquisition date. ASC 805 generally requires the acquirer in a business combination to recognize and measure the assets it acquires and the liabilities it assumes at fair value on the acquisition date. The changes are effective for annual periods beginning after December 15, 2022. The Company early adopted ASU 2021-08 in December 2021. The contract assets and contract liabilities associated with the Jake Marshall Transaction have been valued in accordance with this standard.

Recent Accounting Pronouncements

In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments, which introduced an expected credit loss methodology for the measurement and recognition of credit losses on most financial instruments, including trade receivables and off-balance sheet credit exposure. Under this guidance, an entity is required to consider a broader range of information to estimate expected credit losses, which may result in earlier recognition of losses. This ASU also requires disclosure of information regarding how a company developed its allowance, including changes in the factors that influenced management’s estimate of expected credit losses and the reasons for those changes. The guidance is effective for smaller reporting companies on January 1, 2023 with early adoption permitted. The adoption of this standard will be through a cumulative-effect adjustment to retained earnings as of the effective date. Based on its historical experience, the Company does not expect that this pronouncement will have a significant impact in its condensed consolidated financial statements or on the estimate of the allowance for doubtful accounts.

The FASB has issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting in March 2020. This new guidance provides optional expedients for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform, on financial reporting. The risk of termination of the London Interbank Offered Rate (LIBOR), has caused regulators to undertake reference rate reform initiatives to identify alternative reference rates that are more observable or transaction based that are less susceptible to manipulation. ASU 2020-04 is effective between March 12, 2020 and December 31, 2022.

In addition, in January 2021, the FASB issued ASU 2021-01, Reference Rate Reform (Topic 848): Scope. The amendments in this update refine the scope for certain optional expedients and exceptions for contract modifications and hedge accounting to apply to derivative contracts and certain hedging relationships affected by the discounting transition. The amendments in this update are effective for all entities as of March 12, 2020 through December 31, 2022. The Company is currently evaluating the impact of adopting the reference rate reform guidance (both ASU 2020-04 and ASU 2021-01) on its condensed consolidated financial statements. As discussed in Note 6, the A&R Credit Agreement removed LIBOR as a benchmark rate and now utilizes SOFR (as defined in the A&R Credit Agreement) as its replacement.

In August 2020, the FASB issued ASU 2020-06, Debt - Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity's Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity's Own Equity, which simplifies the accounting for certain financial instruments with characteristics of liabilities and equity and amends the scope guidance for contracts in an entity's own equity. The ASU addresses how convertible instruments are accounted for in the calculation of diluted earnings per share by using the if-converted method. The guidance is effective for all entities for fiscal years beginning after March 31, 2024, albeit early adoption is permitted no earlier than fiscal years beginning after December 15, 2020. Management is currently assessing the impact of this pronouncement on its condensed consolidated financial statements.

Revenue from Contract with Customers

Revenue from Contracts with Customers

The Company generates revenue principally from fixed-price construction contracts to deliver HVAC, plumbing, and electrical construction services to its customers. The duration of its contracts generally ranges from six months to two years. Revenue from fixed price contracts is recognized on the cost-to-cost method, measured by the relationship of total cost incurred to total estimated contract costs. Revenue from time and materials contracts is recognized as services are performed. The Company believes that its extensive experience in HVAC, plumbing, and electrical projects, and its internal cost review procedures during the bidding process, enable it to reasonably estimate costs and mitigate the risk of cost overruns on fixed price contracts.

The Company generally invoices customers on a monthly basis, based on a schedule of values that breaks down the contract amount into discrete billing items. Costs and estimated earnings in excess of billings on uncompleted contracts are recorded as a contract asset until billable under the contract terms. Billings in excess of costs and estimated earnings on uncompleted contracts are recorded as a contract liability until the related revenue is recognizable. The Company classifies contract assets and liabilities that may be settled beyond one year from the balance sheet date as current, consistent with the length of time of the Company’s project operating cycle.

Retainage receivable represents amounts invoiced to customers where payments have been partially withheld, typically 10%, pending the completion of certain milestones, satisfaction of other contractual conditions or the completion of the project. Retainage agreements vary from project to project and balances could be outstanding for several months or years depending on a number of circumstances such as contract-specific terms, project performance and other variables that may arise as the Company makes progress towards completion.

Contract assets represent the excess of contract costs and profits (or contract revenue) over the amount of contract billings to date and are classified as a current asset. Contract assets result when either: (1) the appropriate contract revenue amount has been recognized over time in accordance with ASC Topic 606, but a portion of the revenue recorded cannot be currently billed due to the billing terms defined in the contract, or (2) costs are incurred related to certain claims and unapproved change orders. Claims occur when there is a dispute regarding both a change in the scope of work and the price associated with that change. Unapproved change orders occur when a change in the scope of work results in additional work being performed before the parties have agreed on the corresponding change in the contract price. The Company routinely estimates recovery related to claims and unapproved change orders as a form of variable consideration at the most likely amount it expects to receive and to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. Claims and unapproved change orders are billable upon the agreement and resolution between the contractual parties and after the execution of contractual amendments. Increases in claims and unapproved change orders typically result from costs being incurred against existing or new positions; decreases normally result from resolutions and subsequent billings.

Billings in excess of costs represent the excess of contract billings to date over the amount of contract costs and profits (or contract revenue) recognized to date. The balance may fluctuate depending on the timing of contract billings and the recognition of contract revenue.

Provisions for losses are recognized in the condensed consolidated statements of operations at the uncompleted performance obligation level for the amount of total estimated losses in the period that evidence indicates that the estimated total cost of a performance obligation exceeds its estimated total revenue.

Remaining Performance Obligations

Remaining performance obligations represent the transaction price of firm orders for which work has not been performed and exclude unexercised contract options. The Company’s remaining performance obligations include projects that have a written award, a letter of intent, a notice to proceed or an agreed upon work order to perform work on mutually accepted terms and conditions.

Additionally, the difference between remaining performance obligations and backlog is due to the exclusion of a portion of the Company’s ODR agreements under certain contract types from the Company’s remaining performance obligations as these contracts can be canceled for convenience at any time by the Company or the customer without considerable cost incurred by the customer.

Fair Value Measurements

The Company measures the fair value of financial assets and liabilities in accordance with ASC Topic 820 – Fair Value Measurements and Disclosures, which defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. ASC Topic 820 establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value and requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to measurements involving significant unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are as follows:

•Level 1 — inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that are accessible at the measurement date;

•Level 2 — inputs other than quoted prices included in Level 1 that are observable for the asset or liability either directly or indirectly such as quoted prices in active markets for similar assets and liabilities, quoted prices for identical or similar assets or liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of assets or liabilities; and

•Level 3 — unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions.

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Acquisitions (Tables)

3 Months Ended

Mar. 31, 2022

Business Combination and Asset Acquisition [Abstract]

Schedule of Allocation of Fair Value of Assets and Liabilities from Jake Marshall Transaction

The following table summarizes the allocation of the fair value of the assets and liabilities of the Jake Marshall Transaction as of the Effective Date by the Company.

(in thousands)	Purchase Price Allocation
Consideration:
Cash	$	21,313
Earnout provision	3,089
Total Consideration	24,402
Fair value of assets acquired:
Cash and cash equivalents	2,336
Accounts receivable	7,165
Contract assets	1,711
Other current assets	164
Property and equipment	5,762
Intangible assets	5,710
Amount attributable to assets acquired	22,848
Fair value of liabilities assumed:
Accounts payable, including retainage	2,655
Accrued expenses and other current liabilities	570
Contract liabilities	462
Amount attributable to liabilities assumed	3,687
Goodwill	$	5,241

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Revenue from Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2022

Revenue from Contract with Customer [Abstract]

Schedule of Components of Contract Asset and Liability Balances

Contract assets include amounts due under retainage provisions and costs and estimated earnings in excess of billings. The components of the contract asset balances as of the respective dates were as follows:

(in thousands)	March 31, 2022		December 31, 2021		Change
Contract assets
Costs in excess of billings and estimated earnings	$	41,949	$	47,447	$	(5,498)
Retainage receivable	33,594		36,416		(2,822)
Total contract assets	$	75,543	$	83,863	$	(8,320)

Contract liabilities include billings in excess of contract costs and provisions for losses. The components of the contract liability balances as of the respective dates were as follows:

(in thousands)	March 31, 2022		December 31, 2021		Change
Contract liabilities
Billings in excess of costs and estimated earnings	$	34,053	$	26,293	$	7,760
Provisions for losses	391		419		(28)
Total contract liabilities	$	34,444	$	26,712	$	7,732

Schedule of Contracts In Progress

The net underbilling position for contracts in process consisted of the following:

(in thousands)	March 31, 2022		December 31, 2021
Revenue earned on uncompleted contracts	$	679,170	$	758,450
Less: Billings to date	(671,274)		(737,296)
Net underbilling	$	7,896	$	21,154
(in thousands)	March 31, 2022		December 31, 2021
Costs in excess of billings and estimated earnings	$	41,949	$	47,447
Billings in excess of costs and estimated earnings	(34,053)		(26,293)
Net underbilling	$	7,896	$	21,154

Schedule of Revisions in Contract Estimates

The following table summarizes the Company’s recorded revisions in its contract estimates for certain GCR and ODR projects for the three months ended March 31, 2022 and 2021 (includes material gross profit changes of $0.25 million or more).

	For the Three Months Ended March 31,
	2022			2021
(in thousands except number of projects )			Number of Projects			Number of Projects
Gross profit write-ups:
GCR	$	533	2	$	743	2
ODR	—		—	—		—
Total gross profit write-ups	$	533	2	$	743	2
Gross profit write-downs:
GCR	$	(604)	2	$	(768)	2
ODR	—		—	—		—
Total gross profit write-downs	$	(604)	2	$	(768)	2
Total gross profit write-downs, net	$	(71)		$	(25)

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Goodwill and Intangibles (Tables)

3 Months Ended

Mar. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

Intangible assets are comprised of the following:     

(in thousands)	Gross carrying amount		Accumulated amortization		Net intangible assets, excluding goodwill
March 31, 2022
Amortized intangible assets:
Customer relationships – GCR – Jake Marshall	$	570	$	(27)	$	543
Customer relationships – ODR – Jake Marshall	3,050		(134)		2,916
Customer relationships – ODR – Limbach	4,710		(3,555)		1,155
Favorable leasehold interests – Limbach	190		(86)		104
Backlog – GCR – Jake Marshall	260		(55)		205
Backlog – ODR – Jake Marshall	680		(143)		537
Trade name – Jake Marshall	1,150		(62)		1,088
Total amortized intangible assets	10,610		(4,062)		6,548
Unamortized intangible assets:
Trade name – Limbach(1)	9,960		—		9,960
Total unamortized intangible assets	9,960		—		9,960
Total amortized and unamortized assets, excluding goodwill	$	20,570	$	(4,062)	$	16,508

(1)    The Company has determined that its trade name has an indefinite useful life. The Limbach trade name has been in existence since the Company’s founding in 1901 and therefore is an established brand within the industry.

(in thousands)	Gross carrying amount		Accumulated amortization		Net intangible assets, excluding goodwill
December 31, 2021
Amortized intangible assets:
Customer relationships – GCR – Jake Marshall	$	570	$	(6)	$	564
Customer relationships – ODR – Jake Marshall	3,050		(35)		3,015
Customer relationships – ODR – Limbach	4,710		(3,475)		1,235
Favorable leasehold interests – Limbach	190		(82)		108
Backlog – GCR – Jake Marshall	260		(14)		246
Backlog – ODR – Jake Marshall	680		(36)		644
Trade name – Jake Marshall	1,150		(15)		1,135
Total amortized intangible assets	10,610		(3,663)		6,947
Unamortized intangible assets:
Trade name – Limbach	9,960		—		9,960
Total unamortized intangible assets	9,960		—		9,960
Total amortized and unamortized assets, excluding goodwill	$	20,570	$	(3,663)	$	16,907

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Debt (Tables)

3 Months Ended

Mar. 31, 2022

Debt Disclosure [Abstract]

Schedule of Long-Term Debt

Long-term debt consists of the following obligations as of:

(in thousands)	March 31, 2022		December 31, 2021
A&R Wintrust Term Loan - term loan payable in quarterly installments of principal, (commencing in December 2021) plus interest through February 2026	33,024		34,881
A&R Wintrust Revolving Loan	9,400		—
Finance leases – collateralized by vehicles, payable in monthly installments of principal, plus interest ranging from 4.40% to 6.45% through 2025	5,317		5,132
Total debt	47,741		40,013
Less - Current portion of long-term debt	(13,222)		(9,879)
Less - Unamortized discount and debt issuance costs	(299)		(318)
Long-term debt	$	34,220	$	29,816

Schedule of Additional Margin and Commitment Fees Payable

Level	Senior Leverage Ratio	Additional Margin for Prime Rate loans		Additional Margin for Prime Revolving loans		Additional Margin for Eurodollar Term loans
I	Greater than 1.00 to 1.00	1.00	%	0.50	%	0.25	%
II	Less than or equal to 1.00 to 1.00	0.25	%	—	%	0.25	%

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Equity (Tables)

3 Months Ended

Mar. 31, 2022

Equity [Abstract]

Schedule of Outstanding Warrants

	March 31, 2022	December 31, 2021
$15 Exercise Price Sponsor Warrants(1)(2)	600,000	600,000
Merger Warrants(3)(4)	629,643	629,643
Total	1,229,643	1,229,643

(1)    Exercisable for one share of common stock at an exercise price of $15.00 per share (“$15 Exercise Price Sponsor Warrants”).

(2)    Issued under a warrant agreement dated July 15, 2014, between Continental Stock Transfer and Trust Company, as warrant agent, and the Company.

(3)    Exercisable for one share of common stock at an exercise price of $12.50 per share (“Merger Warrants”).

(4)    Issued to the sellers of LHLLC.

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Earnings per Share (Tables)

3 Months Ended

Mar. 31, 2022

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The following table sets forth the computation of the basic and diluted earnings per share attributable to the Company's common shareholders for the three months ended March 31, 2022 and 2021:

	Three Months Ended March 31,
(in thousands, except per share amounts)	2022		2021
EPS numerator:
Net loss	$	(1,516)	$	(2,282)
EPS denominator:
Weighted average shares outstanding – basic	10,421		9,218
Impact of dilutive securities(1)	—		—
Weighted average shares outstanding – diluted	10,421		9,218
EPS:
Basic	$	(0.15)	$	(0.25)
Diluted	$	(0.15)	$	(0.25)

(1)    For the three months ended March 31, 2022 and 2021, the Company excluded 153,741 and 603,847, respectively, of weighted average anti-dilutive securities related to certain of the Company's outstanding common stock warrants, shares issued in conjunction with the Company's ESPP and nonvested RSUs.

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following table summarizes the securities that were antidilutive or out-of-the-money, and therefore, were not included in the computations of diluted income per common share:

	Three Months Ended March 31,
	2022	2021
In-the-money warrants	—	365,556
Out-of-the-money warrants (see Note 7)	1,229,643	600,000
Service-based RSUs (See Note 14)	70,999	143,647
Performance and market-based RSUs(1)	87,053	90,729
Employee Stock Purchase Plan	3,547	3,627
Total	1,391,242	1,203,559

(1)    For the three months ended March 31, 2022 and 2021, certain PRSU and MRSU awards (each defined in Note 14) were not included in the computation of diluted income per common share because the performance and market conditions were not satisfied during the periods and would not be satisfied if the reporting date was at the end of the contingency period.

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Operating Segments (Tables)

3 Months Ended

Mar. 31, 2022

Segment Reporting [Abstract]

Schedule of Condensed Consolidated Segment Information

Condensed consolidated segment information for the three months ended March 31, 2022 and 2021 were as follows:

	Three months ended March 31,
(in thousands)	2022		2021
Statement of Operations Data:
Revenue:
GCR	$	71,932	$	84,804
ODR	42,890		28,540
Total revenue	114,822		113,344
Gross profit:
GCR	8,358		9,395
ODR	9,982		7,834
Total gross profit	18,340		17,229
Selling, general and administrative:
GCR	8,565		9,114
ODR	9,570		7,354
Corporate	599		677
Total selling, general and administrative	18,734		17,145
Amortization of intangibles	399		104
Operating loss	$	(793)	$	(20)
Less unallocated amounts:
Interest expense, net	(486)		(1,264)
Loss on disposition of property and equipment	(36)		(86)
Loss on early termination of operating lease	(817)		—
Loss on early debt extinguishment	—		(1,961)
Gain on change in fair value of warrant liability	—		14
Total unallocated amounts	(1,339)		(3,297)
Loss before income taxes	$	(2,132)	$	(3,317)
Other Data:
Depreciation and amortization:
GCR	$	1,108	$	1,036
ODR	555		355
Corporate	399		104
Total other data	$	2,062	$	1,495

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Leases (Tables)

3 Months Ended

Mar. 31, 2022

Leases [Abstract]

Supplemental Balance Sheets Information

The following table summarizes the lease amounts included in the Company's condensed consolidated balance sheets:

(in thousands)	Classification on the Condensed Consolidated Balance Sheets	March 31, 2022		December 31, 2021
Assets
Operating	Operating lease right-of-use assets(1)	$	17,719	$	20,119
Finance	Property and equipment, net(2)	5,111		4,916
Total lease assets		$	22,830	$	25,035
Liabilities
Current
Operating	Current operating lease liabilities	$	3,762	$	4,366
Finance	Current portion of long-term debt	2,458		2,451
Noncurrent
Operating	Long-term operating lease liabilities	14,787		16,576
Finance	Long-term debt	2,859		2,681
Total lease liabilities		$	23,866	$	26,074

(1)     Operating lease assets are recorded net of accumulated amortization of $15.6 million at March 31, 2022 and $15.9 million at December 31, 2021.

(2)    Finance lease assets are recorded net of accumulated amortization of $6.4 million at March 31, 2022 and $5.9 million at December 31, 2021.

Summary of Lease Costs, Lease Terms and Discount Rates

The following table summarizes the lease costs included in the Company's condensed consolidated statements of operations for the three months ended March 31, 2022 and 2021:

		Three Months Ended March 31,
(in thousands)	Classification on the Condensed Consolidated Statement of Operations	2022		2021
Operating lease cost	Cost of revenue(1)	$	694	$	690
Operating lease cost	Selling, general and administrative(1)	704		584
Finance lease cost
Amortization	Cost of revenue(2)	651		674
Interest	Interest expense, net(2)	66		86
Total lease cost		$	2,115	$	2,034

(1)    Operating lease costs recorded in cost of revenue included $0.1 million of variable lease costs for both the three months ended March 31, 2022 and 2021. In addition, $0.1 million of variable lease costs are included in selling, general and administrative for both the three months ended March 31, 2022 and 2021. These variable costs consist of the Company's proportionate share of operating expenses, real estate taxes and utilities.

(2)     Finance lease costs recorded in cost of revenue include variable lease costs of $0.8 million for the three months ended March 31, 2022 and $0.6 million for the three months ended March 31, 2021. These variable lease costs consist of fuel, maintenance, and sales tax charges.

The following is a summary of the lease terms and discount rates:

	March 31, 2022		December 31, 2021
Weighted average lease term (in years):
Operating	7.30		7.10
Finance	2.60		2.51
Weighted average discount rate:
Operating	4.67	%	4.68	%
Finance	5.14	%	5.27	%

Future Minimum Commitment for Finance Leases

Future minimum commitments for finance and operating leases that have non-cancelable lease terms in excess of one year as of March 31, 2022 were as follows:

			Operating Leases
Year ending (in thousands):	Finance Leases		Non-Related Party		Related Party(1)		Sublease Receipts(2)		Total Operating
Remainder of 2022	$	1,934	$	3,252	$	338	$	(623)	$	2,967
2023	1,758		3,108		450		(885)		2,673
2024	1,026		2,502		450		(912)		2,040
2025	500		2,148		450		(939)		1,659
2026	99		2,010		450		(967)		1,493
Thereafter	—		2,033		4,815		(327)		6,521
Total minimum lease payments	$	5,317	$	15,053	$	6,953	$	(4,653)	$	17,353
Amounts representing interest	358
Present value of net minimum lease payments	$	5,675

(1)    Associated with the aforementioned related party lease entered into with a former member of JMLLC.

(2)    Associated with the aforementioned third party sublease.

Future Minimum Commitment for Operating Leases

Future minimum commitments for finance and operating leases that have non-cancelable lease terms in excess of one year as of March 31, 2022 were as follows:

			Operating Leases
Year ending (in thousands):	Finance Leases		Non-Related Party		Related Party(1)		Sublease Receipts(2)		Total Operating
Remainder of 2022	$	1,934	$	3,252	$	338	$	(623)	$	2,967
2023	1,758		3,108		450		(885)		2,673
2024	1,026		2,502		450		(912)		2,040
2025	500		2,148		450		(939)		1,659
2026	99		2,010		450		(967)		1,493
Thereafter	—		2,033		4,815		(327)		6,521
Total minimum lease payments	$	5,317	$	15,053	$	6,953	$	(4,653)	$	17,353
Amounts representing interest	358
Present value of net minimum lease payments	$	5,675

(1)    Associated with the aforementioned related party lease entered into with a former member of JMLLC.

(2)    Associated with the aforementioned third party sublease.

Leases Supplemental Cash Flow Information

The following is a summary of other information and supplemental cash flow information related to finance and operating leases:

	Three months ended March 31,
(in thousands)	2022		2021
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	1,358	$	1,225
Operating cash flows from finance leases	66		86
Financing cash flows from finance leases	660		667
Right-of-use assets exchanged for lease liabilities:
Operating leases	—		156
Finance leases	864		87
Right-of-use assets disposed or adjusted modifying operating leases liabilities	(1,276)		36
Right-of-use assets disposed or adjusted modifying finance leases liabilities	$	(19)	—

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Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2022

Commitments and Contingencies Disclosure [Abstract]

Schedule of Components of Self-Insurance

The components of the self-insurance liability as of March 31, 2022 and December 31, 2021 are as follows:

(in thousands)	March 31, 2022		December 31, 2021
Current liability — workers’ compensation and general liability	$	173	$	184
Current liability — medical and dental	373		456
Non-current liability	447		451
Total liability	$	993	$	1,091
Restricted cash	$	113	$	113

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Management Incentive Plans (Tables)

3 Months Ended

Mar. 31, 2022

RSUs

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Nonvested Restricted Stock Units Activity

The following table summarizes the Company's service-based RSU activity for the three months ended March 31, 2022:

	Awards	Weighted-Average Grant Date Fair Value
Unvested at December 31, 2021	266,089	$	8.45
Granted	180,739	9.00
Vested	(120,401)	7.43
Forfeited	(10,958)	9.29
Unvested at March 31, 2022	315,469	$	9.13

PRSUs

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Nonvested Restricted Stock Units Activity

The following table summarizes the Company's PRSU activity for the three months ended March 31, 2022:

	Awards	Weighted-Average Grant Date Fair Value
Unvested at December 31, 2021	280,700	$	9.46
Granted	249,885	7.17
Vested	—	—
Forfeited	(6,500)	9.04
Unvested at March 31, 2022	524,085	$	8.38

MRSUs

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Nonvested Restricted Stock Units Activity

The following table summarizes the Company's market-based RSU (“MRSUs”) activity for the three months ended March 31, 2022:

	Awards	Weighted-Average Grant Date Fair Value
Unvested at December 31, 2021	102,500	$	8.26
Granted	—	—
Vested	—	—
Forfeited	—	—
Unvested at March 31, 2022	102,500	$	8.26

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Business and Organization (Details)	3 Months Ended
	Mar. 31, 2022 segment
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of operating segments	2
Service period	2 years

XML

Acquisitions - Narrative (Details) - Jake Marshall Transaction $ in Thousands	Dec. 02, 2021 USD ($) payment
Business Acquisition [Line Items]
Closing purchase price	$ 21,313
Amount of consideration paid held in escrow for indemnification purposes	1,000
Earnout payments	6,000
Earn Out Payment Two
Business Acquisition [Line Items]
Earnout payments	$ 3,000
Number of earnout tranches | payment	2
Earnout period	13 months
Earn Out Payment Two | Maximum
Business Acquisition [Line Items]
Gross profits from acquired companies	$ 10,000
Earn Out Payment Two | Minimum
Business Acquisition [Line Items]
Gross profits from acquired companies	8,000
Earn Out Payment One
Business Acquisition [Line Items]
Earnout payments	$ 3,000
Number of earnout tranches | payment	2
Earnout period	13 months
Earn Out Payment One | Maximum
Business Acquisition [Line Items]
Gross profits from acquired companies	$ 10,000
Earn Out Payment One | Minimum
Business Acquisition [Line Items]
Gross profits from acquired companies	8,000
ODR
Business Acquisition [Line Items]
Goodwill associated with acquisition	5,200
Goodwill fully deductible for tax purposes	$ 5,200

XML

Acquisitions - Allocation of Purchase Price of Assets and Liabilities from Jake Marshall Transaction (Details) - USD ($) $ in Thousands	Dec. 02, 2021	Mar. 31, 2022	Dec. 31, 2021
Fair value of liabilities assumed:
Goodwill		$ 11,370	$ 11,370
Jake Marshall Transaction
Consideration:
Cash	$ 21,313
Earnout provision	3,089
Total Consideration	24,402
Fair value of assets acquired:
Cash and cash equivalents	2,336
Accounts receivable	7,165
Contract assets	1,711
Other current assets	164
Property and equipment	5,762
Intangible assets	5,710
Amount attributable to assets acquired	22,848
Fair value of liabilities assumed:
Accounts payable, including retainage	2,655
Accrued expenses and other current liabilities	570
Contract liabilities	462
Amount attributable to liabilities assumed	3,687
Goodwill	$ 5,241

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Revenue from Contracts with Customers - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Term of revenue contracts	six months to two years
Percentage completed of certain milestones	10.00%
Net amount of unresolved change orders and claims	$ 39,900		$ 38,100
Revision amount for gross profit impact on contract estimates (more than)	250	$ 250
Total net gross profits write ups (downs)	$ 1,400	$ 500
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligations, expected timing of satisfaction, period	24 months
GCR
Disaggregation of Revenue [Line Items]
Remaining performance obligations, amount	$ 340,700
GCR | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligations, percentage	60.00%
Revenue, remaining performance obligations, expected timing of satisfaction, period	9 months
GCR | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligations, percentage	40.00%
Revenue, remaining performance obligations, expected timing of satisfaction, period	1 year 3 months
ODR
Disaggregation of Revenue [Line Items]
Remaining performance obligations, amount	$ 90,400
ODR | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligations, percentage	73.00%
Revenue, remaining performance obligations, expected timing of satisfaction, period	9 months
ODR | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Disaggregation of Revenue [Line Items]
Revenue, remaining performance obligations, percentage	27.00%
Revenue, remaining performance obligations, expected timing of satisfaction, period	1 year 3 months

XML

Revenue from Contracts with Customers - Components of Contract Asset and Liability Balances (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Contract assets
Costs in excess of billings and estimated earnings	$ 41,949		$ 47,447
Retainage receivable	33,594		36,416
Total contract assets	75,543		83,863
Change in costs in excess of billings and estimated earnings	(5,498)
Change in retainage receivable	(2,822)
Change in total contract assets	(8,320)	$ 1,986
Contract liabilities
Billings in excess of costs and estimated earnings	34,053		26,293
Provisions for losses	391		419
Total contract liabilities	34,444		$ 26,712
Change in billings in excess of costs and estimated earnings	7,760
Change in provisions for losses	(28)
Change in total contract liabilities	$ 7,732	$ (8,853)

XML

Revenue from Contracts with Customers - Contracts In Progress (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Revenue earned on uncompleted contracts	$ 679,170	$ 758,450
Less: Billings to date	(671,274)	(737,296)
Net underbilling	7,896	21,154
Costs in excess of billings and estimated earnings	41,949	47,447
Billings in excess of costs and estimated earnings	$ (34,053)	$ (26,293)

XML

Revenue from Contracts with Customers - Revisions in Contract Estimates (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) project	Mar. 31, 2021 USD ($) project
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Gross profit write-up	$ 533	$ 743
Number of Projects | project	2	2
Gross profit write ups	$ (604)	$ (768)
Number of Projects | project	2	2
Total gross profit write-downs, net	$ (71)	$ (25)
GCR
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Gross profit write-up	$ 533	$ 743
Number of Projects | project	2	2
Gross profit write ups	$ (604)	$ (768)
Number of Projects | project	2	2
ODR
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Gross profit write-up	$ 0	$ 0
Number of Projects | project	0	0
Gross profit write ups	$ 0	$ 0
Number of Projects | project	0	0

XML

Goodwill and Intangibles - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 11,370,000		$ 11,370,000
Impairment of intangible assets (excluding goodwill)	0	$ 0
Amortization of intangibles	$ 399,000	$ 104,000

XML

Goodwill and Intangibles - Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Amortized intangible assets:
Gross carrying amount	$ 10,610	$ 10,610
Accumulated amortization	(4,062)	(3,663)
Net intangible assets, excluding goodwill	6,548	6,947
Unamortized intangible assets:
Gross carrying amount	9,960	9,960
Net intangible assets, excluding goodwill	9,960	9,960
Gross carrying amount	20,570	20,570
Accumulated amortization	(4,062)	(3,663)
Total amortized and unamortized assets, excluding goodwill	16,508	16,907
Trade name – Jake Marshall
Unamortized intangible assets:
Gross carrying amount	9,960	9,960
Net intangible assets, excluding goodwill	9,960	9,960
Customer Relationships | GCR | Jake Marshall Transaction
Amortized intangible assets:
Gross carrying amount	570	570
Accumulated amortization	(27)	(6)
Net intangible assets, excluding goodwill	543	564
Unamortized intangible assets:
Accumulated amortization	(27)	(6)
Customer Relationships | ODR
Amortized intangible assets:
Gross carrying amount	4,710	4,710
Accumulated amortization	(3,555)	(3,475)
Net intangible assets, excluding goodwill	1,155	1,235
Unamortized intangible assets:
Accumulated amortization	(3,555)	(3,475)
Customer Relationships | ODR | Jake Marshall Transaction
Amortized intangible assets:
Gross carrying amount	3,050	3,050
Accumulated amortization	(134)	(35)
Net intangible assets, excluding goodwill	2,916	3,015
Unamortized intangible assets:
Accumulated amortization	(134)	(35)
Favorable Leasehold Interests
Amortized intangible assets:
Gross carrying amount	190	190
Accumulated amortization	(86)	(82)
Net intangible assets, excluding goodwill	104	108
Unamortized intangible assets:
Accumulated amortization	(86)	(82)
Backlog – Construction | GCR | Jake Marshall Transaction
Amortized intangible assets:
Gross carrying amount	260	260
Accumulated amortization	(55)	(14)
Net intangible assets, excluding goodwill	205	246
Unamortized intangible assets:
Accumulated amortization	(55)	(14)
Backlog – Construction | ODR | Jake Marshall Transaction
Amortized intangible assets:
Gross carrying amount	680	680
Accumulated amortization	(143)	(36)
Net intangible assets, excluding goodwill	537	644
Unamortized intangible assets:
Accumulated amortization	(143)	(36)
Trade name – Jake Marshall | Jake Marshall Transaction
Amortized intangible assets:
Gross carrying amount	1,150	1,150
Accumulated amortization	(62)	(15)
Net intangible assets, excluding goodwill	1,088	1,135
Unamortized intangible assets:
Accumulated amortization	$ (62)	$ (15)

XML

Debt - Long-Term Debt (Details) - USD ($) $ in Thousands		3 Months Ended
	Feb. 24, 2021	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Debt Instrument [Line Items]
Finance leases – collateralized by vehicles, payable in monthly installments of principal, plus interest ranging from 4.40% to 6.45% through 2025		$ 5,317		$ 5,132
Total debt		47,741		40,013
Less - Current portion of long-term debt		(13,222)		(9,879)
Less - Unamortized discount and debt issuance costs		(299)		(318)
Long-term debt		34,220		29,816
Loss on early debt extinguishment		0	$ 1,961
Prepayment penalty and other costs associated with early debt extinguishment		$ 0	$ 1,376
Minimum
Debt Instrument [Line Items]
Finance lease, discount rate		4.40%
Maximum
Debt Instrument [Line Items]
Finance lease, discount rate		6.45%
2019 Refinancing Agreement
Debt Instrument [Line Items]
Loss on early debt extinguishment	$ 2,000
Write off of debt issuance and discount costs	2,600
Reversal or warrant liability	2,000
Prepayment penalty and other costs associated with early debt extinguishment	$ 1,400
Secured Debt | A&R Wintrust Term Loan - term loan payable in quarterly installments of principal, (commencing in December 2021) plus interest through February 2026
Debt Instrument [Line Items]
Long term debt		$ 33,024		34,881
Revolving Credit Facility | A&R Wintrust Revolving Loan
Debt Instrument [Line Items]
Long term debt		$ 9,400		$ 0

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Debt - 2019 Refinancing Agreement - 2019 Term Loans (Details) - 2019 Refinancing Agreement - USD ($)		3 Months Ended
	Apr. 12, 2019	Sep. 30, 2020	Feb. 24, 2021
Debt Instrument [Line Items]
Debt issued	$ 40,000,000
Debt installment payments		$ 1,000,000
Unused line fee percentage		2.00%
Make-whole premium prepayment period		19 months
Make-whole provision applicable to interest period		18 months
Debt effective interest rate			13.00%
LIBOR Rate
Debt Instrument [Line Items]
Basis spread on variable rate	11.00%
LIBOR Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate	10.00%
Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	3.00%
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 25,000,000

XML

Debt - 2019 Refinancing Agreement - CB Warrants (Details) - USD ($)		2 Months Ended	3 Months Ended
	Apr. 12, 2019	Feb. 24, 2021	Mar. 31, 2022	Mar. 31, 2021
Debt Instrument [Line Items]
Percentage of number of shares	2.00%
Amortization of debt issuance costs			$ 32,000	$ 190,000
2019 Refinancing Term Loan - CB Warrants
Debt Instrument [Line Items]
Class of warrant or right, number of securities called by each warrant or right (in shares)	263,314	0
Exercise price of warrants (in usd per share)	$ 7.63
Debt outstanding		$ 0
2019 Refinancing Agreement
Debt Instrument [Line Items]
Warrants term	5 years
Interest expense, debt		100,000
Amortization of debt issuance costs		$ 100,000

XML

Debt - 2019 ABL Credit Agreement (Details) - 2019 Refinancing Revolving Credit Facility - USD ($)	Apr. 12, 2019	Feb. 24, 2021
Debt Instrument [Line Items]
Debt effective interest rate		5.25%
Letters of credit		$ 3,400,000
LIBOR Rate
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
LIBOR Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	3.00%
LIBOR Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	3.50%
Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate	3.00%
Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
Base Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	2.50%
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 15,000,000

XML

Debt - Wintrust Term and Revolving Loans (Details)	Dec. 02, 2021 USD ($) covenant	Feb. 24, 2021 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Wintrust Loans
Debt Instrument [Line Items]
Letters of credit			$ 3,300,000
Wintrust Term Loan
Debt Instrument [Line Items]
Debt effective interest rate			4.50%
A&R Wintrust Term And Revolving Loans
Debt Instrument [Line Items]
Debt effective interest rate			4.00%
Number of financial covenants | covenant	3
Debt instrument, covenant compliance, leverage ratio	200.00%
Debt instrument, covenant compliance, coverage ratio	1.20
Aggregate amount of unfinanced capital expenditures during any fiscal year	$ 0
Limit annual percentage of unfinanced capital expenditures	50.00%
Debt instrument, fee amount			$ 14,000
A&R Wintrust Term And Revolving Loans | Minimum
Debt Instrument [Line Items]
Amount drawn under credit agreement			9,400,000
Average daily balance of borrowings outstanding			100,000
A&R Wintrust Term And Revolving Loans | Maximum
Debt Instrument [Line Items]
Aggregate amount of unfinanced capital expenditures during any fiscal year	$ 4,000,000
Amount drawn under credit agreement			$ 9,400,000	$ 0
Secured Debt | Wintrust Term Loan
Debt Instrument [Line Items]
Debt issued		$ 30,000,000
Debt installment payments		$ 500,000
Secured Debt | A&R Wintrust Term Loan
Debt Instrument [Line Items]
Debt installment payments	600,000
Secured Debt | A&R Wintrust Term Loan | Jake Marshall Transaction
Debt Instrument [Line Items]
Debt issued	35,500,000
Secured Debt | Revolving Credit Facility | A&R Wintrust Revolving Loan | Jake Marshall Transaction
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	25,000,000
Secured Debt | Sublimit for Letters of Credit | A&R Wintrust Revolving Loan | Jake Marshall Transaction
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 5,000,000
Line of Credit | A&R Wintrust Term Loan | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
Step-down adjustment on basis spread on variable rate	7500.00%
Line of Credit | A&R Wintrust Term Loan | Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	3.00%
Line of Credit | A&R Wintrust Term Loan | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Step-down adjustment on basis spread on variable rate	5000.00%
Line of Credit | A&R Wintrust Term Loan | Secured Overnight Financing Rate (SOFR) | Variable Rate Component Two
Debt Instrument [Line Items]
Basis spread on variable rate	4.26%
Line of Credit | A&R Wintrust Term Loan | Secured Overnight Financing Rate (SOFR) | Variable Rate Component Three
Debt Instrument [Line Items]
Basis spread on variable rate	4.42%
Line of Credit | A&R Wintrust Term Loan | Secured Overnight Financing Rate (SOFR) | Variable Rate Component One
Debt Instrument [Line Items]
Basis spread on variable rate	4.10%
Line of Credit | A&R Wintrust Term Loan | Secured Overnight Financing Rate (SOFR) | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	0.15%
Line of Credit | Revolving Credit Facility | Wintrust Term Loan | LIBOR Rate
Debt Instrument [Line Items]
Step-down adjustment on basis spread on variable rate		0.50%
Line of Credit | Revolving Credit Facility | Wintrust Term Loan | LIBOR Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate		0.25%
Line of Credit | Revolving Credit Facility | Wintrust Term Loan | LIBOR Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate		4.00%
Line of Credit | Revolving Credit Facility | Wintrust Term Loan | Base Rate
Debt Instrument [Line Items]
Step-down adjustment on basis spread on variable rate		0.75%
Line of Credit | Revolving Credit Facility | Wintrust Term Loan | Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate		3.00%
Line of Credit | Revolving Credit Facility | Wintrust Term Loan | Base Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate		1.00%
Line of Credit | Revolving Credit Facility | A&R Wintrust Revolving Loan
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 25,000,000
Line of Credit | Revolving Credit Facility | A&R Wintrust Revolving Loan | LIBOR Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate		0.25%
Line of Credit | Revolving Credit Facility | A&R Wintrust Revolving Loan | LIBOR Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate		3.50%
Line of Credit | Revolving Credit Facility | A&R Wintrust Revolving Loan | Base Rate
Debt Instrument [Line Items]
Step-down adjustment on basis spread on variable rate		0.50%
Line of Credit | Revolving Credit Facility | A&R Wintrust Revolving Loan | Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate		3.00%
Line of Credit | Revolving Credit Facility | A&R Wintrust Revolving Loan | Base Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate		0.50%
Line of Credit | Revolving Credit Facility | A&R Wintrust Revolving Loan | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
Step-down adjustment on basis spread on variable rate	5000.00%
Line of Credit | Revolving Credit Facility | A&R Wintrust Revolving Loan | Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	3.00%
Line of Credit | Revolving Credit Facility | A&R Wintrust Revolving Loan | Secured Overnight Financing Rate (SOFR) | Variable Rate Component Two
Debt Instrument [Line Items]
Basis spread on variable rate	3.76%
Line of Credit | Revolving Credit Facility | A&R Wintrust Revolving Loan | Secured Overnight Financing Rate (SOFR) | Variable Rate Component Three
Debt Instrument [Line Items]
Basis spread on variable rate	3.92%
Line of Credit | Revolving Credit Facility | A&R Wintrust Revolving Loan | Secured Overnight Financing Rate (SOFR) | Variable Rate Component One
Debt Instrument [Line Items]
Basis spread on variable rate	3.60%
Line of Credit | Revolving Credit Facility | A&R Wintrust Revolving Loan | Secured Overnight Financing Rate (SOFR) | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	0.15%
Line of Credit | Sublimit for Letters of Credit | A&R Wintrust Revolving Loan
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 5,000,000

XML

Debt - Additional Margin and Commitment Fees Payable (Details)	3 Months Ended
	Mar. 31, 2022
Level I
Debt Instrument [Line Items]
Senior Leverage Ratio	100.00%
Level I | Prime Rate | Wintrust Term Loan
Debt Instrument [Line Items]
Additional Margin for Loans	1.00%
Level I | Prime Rate | A&R Wintrust Revolving Loan
Debt Instrument [Line Items]
Additional Margin for Loans	0.50%
Level I | Eurodollar | Wintrust Term Loan
Debt Instrument [Line Items]
Additional Margin for Loans	0.25%
Level II
Debt Instrument [Line Items]
Senior Leverage Ratio	100.00%
Level II | Prime Rate | Wintrust Term Loan
Debt Instrument [Line Items]
Additional Margin for Loans	0.25%
Level II | Prime Rate | A&R Wintrust Revolving Loan
Debt Instrument [Line Items]
Additional Margin for Loans	0.00%
Level II | Eurodollar | Wintrust Term Loan
Debt Instrument [Line Items]
Additional Margin for Loans	0.25%

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Equity - Narrative (Details) - USD ($)					1 Months Ended	3 Months Ended
	Mar. 09, 2021	Feb. 18, 2021	Feb. 12, 2021	Jan. 01, 2020	Jan. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Dec. 31, 2021
Class of Stock [Line Items]
Common stock, shares authorized (in shares)							100,000,000	100,000,000
Common stock, par or stated value per share (in usd per share)							$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)							1,000,000
Preferred stock, par or stated value per share (in usd per shares)							$ 0.0001
2021 Public Offering
Class of Stock [Line Items]
Number of shares sold (in shares)			1,783,500
Share price (in usd per share)			$ 12.00
Proceeds from sale of shares, net of underwriters discounts and commissions			$ 19,800,000
Over-allotment Option
Class of Stock [Line Items]
Number of shares sold (in shares)			267,525
Share price (in usd per share)			$ 11.28
Period to purchase additional shares			30 days
Proceeds from sale of shares, net of underwriters discounts and commissions		$ 3,000,000
2021 Amended And Restated Omnibus Incentive Plan
Class of Stock [Line Items]
Number of additional shares authorized under share-based compensation plan (in shares)	600,000
Common stock, capital shares reserved for future issuance (in shares)	2,250,000
ESPP | Employee Stock
Class of Stock [Line Items]
Purchase price of common stock, percent of market price (no less than)				85.00%
Maximum employee subscription percentage				10.00%
Maximum contribution amount				$ 5,000
Offering period				6 months
Discount percentage from market price, beginning of purchase period				15.00%
Award vesting period				6 months
Number of shares authorized (in shares)				500,000
Shares issued (in shares)					12,898	8,928
Shares remaining available for future issuance (in shares)							431,209
$15 Exercise Price Sponsor Warrants
Class of Stock [Line Items]
Exercise price of warrants (in usd per share)							$ 15.00	$ 15

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Equity - Outstanding Warrants (Details) - $ / shares	Mar. 31, 2022	Dec. 31, 2021
Class of Stock [Line Items]
Class of warrant or right, outstanding (in shares)	1,229,643	1,229,643
$15 Exercise Price Sponsor Warrants
Class of Stock [Line Items]
Class of warrant or right, outstanding (in shares)	600,000	600,000
Class of warrant or right, number of securities called by each warrant or right (in shares)	1	1
Exercise price of warrants (in usd per share)	$ 15.00	$ 15
Merger Warrants
Class of Stock [Line Items]
Class of warrant or right, outstanding (in shares)	629,643	629,643
Class of warrant or right, number of securities called by each warrant or right (in shares)	1	1
Exercise price of warrants (in usd per share)	$ 12.50	$ 12.50

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Fair Value Measurements (Details)	2 Months Ended	3 Months Ended
	Feb. 24, 2021 USD ($)	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain on change in fair value of warrant liability		$ 0	$ (14,000)
Level 3 | Contingent Consideration Liability | Jake Marshall Transaction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of earnout payments		$ 3,100,000
Level 3 | Contingent Consideration Liability | Jake Marshall Transaction | Measurement Input, Discount Rate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Earnout payments, measurement input		0.0683
Wintrust Term Loan | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of debt		$ 33,000,000
A&R Wintrust Revolving Loan | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of debt		$ 9,400,000
2019 Refinancing Agreement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrants liability	$ 2,000,000		$ 0
Gain on change in fair value of warrant liability	$ 14,000

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Earnings per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
EPS numerator:
Net loss	$ (1,516)	$ (2,282)
EPS denominator:
Weighted average shares outstanding - basic (in shares)	10,420,690	9,218,087
Impact of dilutive securities (in shares)	0	0
Weighted average shares outstanding - diluted (in shares)	10,420,690	9,218,087
EPS:
Basic (in usd per share)	$ (0.15)	$ (0.25)
Diluted (in usd per share)	$ (0.15)	$ (0.25)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	1,391,242	1,203,559
Warrant
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	153,741	603,847

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Earnings per Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) - shares	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	1,391,242	1,203,559
In-the-money warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	0	365,556
Out-of-the money warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	1,229,643	600,000
Service-based RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	70,999	143,647
Performance and market-based RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	87,053	90,729
Employee Stock Purchase Plan
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	3,547	3,627

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Income Taxes (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Effective tax rate	28.90%	31.20%
Excess tax benefits associated with stock based compensation	$ 100,000	$ 200,000
Valuation allowance	$ 0		$ 0

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Operating Segments - Narrative (Details)	3 Months Ended
	Mar. 31, 2022 segment
Segment Reporting Information [Line Items]
Number of operating segments	2
GCR
Segment Reporting Information [Line Items]
Number of reportable segments	1
ODR
Segment Reporting Information [Line Items]
Number of reportable segments	1

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Operating Segments - Condensed Consolidated Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Revenue	$ 114,822	$ 113,344
Total gross profit	18,340	17,229
Selling, general and administrative	18,734	17,145
Amortization of intangibles	399	104
Operating loss	(793)	(20)
Interest expense, net	(486)	(1,264)
Loss on disposition of property and equipment	(36)	(86)
Loss on early termination of operating lease	(817)	0
Loss on early debt extinguishment	0	(1,961)
Gain on change in fair value of warrant liability	0	14
Total unallocated amounts	(1,339)	(3,297)
Loss before income taxes	(2,132)	(3,317)
Depreciation and amortization	2,062	1,495
GCR
Segment Reporting Information [Line Items]
Revenue	71,932	84,804
Total gross profit	8,358	9,395
ODR
Segment Reporting Information [Line Items]
Revenue	42,890	28,540
Total gross profit	9,982	7,834
Operating Segments | GCR
Segment Reporting Information [Line Items]
Selling, general and administrative	8,565	9,114
Depreciation and amortization	1,108	1,036
Operating Segments | ODR
Segment Reporting Information [Line Items]
Selling, general and administrative	9,570	7,354
Depreciation and amortization	555	355
Corporate
Segment Reporting Information [Line Items]
Selling, general and administrative	599	677
Depreciation and amortization	$ 399	$ 104

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Leases - Narrative (Details)		1 Months Ended		3 Months Ended
	Dec. 02, 2021 USD ($) extension	Mar. 31, 2022 USD ($) ft² installment	Jun. 30, 2021 USD ($)	Mar. 31, 2022 USD ($) ft² extension installment	Sep. 30, 2021 ft²
Lessee, Lease, Description [Line Items]
Lease termination fee		$ 700,000
Lease termination fee payable, number of installments | installment		16		16
Gain on derecognition of lease assets and liabilities				$ 100,000
Gain (loss) on disposal of leasehold improvements				$ (100,000)
Real Estate Leases
Lessee, Lease, Description [Line Items]
Number of lease extensions | extension				1
Office Building | Geographic Distribution, Domestic
Lessee, Lease, Description [Line Items]
Subleased area (in sq ft) | ft²		16,720		16,720	71,787
Sublease annual base rent			$ 600,000	$ 800,000
Sublease annual base rent increase percentage			3.00%	3.00%
Sublease income				$ 200,000
Jake Marshall Transaction | Land and Building | Full Time Employee
Lessee, Lease, Description [Line Items]
Lease term	10 years
Number of lease extensions | extension	2
Term of lease extensions	2 years
Jake Marshall Transaction | Land and Building | Full Time Employee | Lease Contractual Term One
Lessee, Lease, Description [Line Items]
Lease term	5 years
Monthly base rent	$ 37,500
Jake Marshall Transaction | Land and Building | Full Time Employee | Lease Contractual Term Two
Lessee, Lease, Description [Line Items]
Lease term	5 years
Monthly base rent	$ 45,000

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Leases - Supplemental Balance Sheets Information (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Operating lease right-of-use assets	$ 17,719	$ 20,119
Property, plant and equipment, net	5,111	4,916
Lease right-of-use assets	22,830	25,035
Current operating lease liabilities	3,762	4,366
Current portion of long-term debt	2,458	2,451
Long-term operating lease liabilities	14,787	16,576
Long-term debt	2,859	2,681
Total lease liabilities	23,866	26,074
Operating lease, accumulated amortization	15,600	15,900
Finance lease, accumulated amortization	$ 6,400	$ 5,900
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Long-term Debt and Lease Obligation, Current	Long-term Debt and Lease Obligation, Current
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Long-term debt	Long-term debt

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Leases - Summary of Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Lessee, Lease, Description [Line Items]
Finance lease cost, amortization	$ 651	$ 674
Finance lease cost, interest expense	66	86
Total lease cost	2,115	2,034
Cost of revenue
Lessee, Lease, Description [Line Items]
Operating lease cost	694	690
Cost of revenue | Operating Lease
Lessee, Lease, Description [Line Items]
Variable lease costs	100	100
Cost of revenue | Finance Lease
Lessee, Lease, Description [Line Items]
Variable lease costs	800	600
Selling, general and administrative expenses
Lessee, Lease, Description [Line Items]
Operating lease cost	704	584
Selling, general and administrative expenses | Operating Lease
Lessee, Lease, Description [Line Items]
Variable lease costs	$ 100	$ 100

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Leases - Future Minimum Lease Commitment (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Finance Lease, Liability, Payment, Due [Abstract]
Remainder of 2022	$ 1,934
2023	1,758
2024	1,026
2025	500
2026	99
Thereafter	0
Present value of net minimum lease payments	5,317	$ 5,132
Amounts representing interest	358
Total minimum lease payments	5,675
Operating Leases
Remainder of 2022	2,967
2023	2,673
2024	2,040
2025	1,659
2026	1,493
Thereafter	6,521
Total minimum lease payments	17,353
Sublease Receipts
Remainder of 2022	(623)
2023	(885)
2024	(912)
2025	(939)
2026	(967)
Thereafter	(327)
Total minimum lease payments	(4,653)
Non-Related Party
Operating Leases
Remainder of 2022	3,252
2023	3,108
2024	2,502
2025	2,148
2026	2,010
Thereafter	2,033
Total minimum lease payments	15,053
Related Party
Operating Leases
Remainder of 2022	338
2023	450
2024	450
2025	450
2026	450
Thereafter	4,815
Total minimum lease payments	$ 6,953

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Leases - Summary of Lease Terms and Discount Rates (Details)	Mar. 31, 2022	Dec. 31, 2021
Weighted average lease term (in years):
Operating	7 years 3 months 18 days	7 years 1 month 6 days
Finance	2 years 7 months 6 days	2 years 6 months 3 days
Weighted average discount rate:
Operating	4.67%	4.68%
Finance	5.14%	5.27%

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Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Leases [Abstract]
Operating cash flows from operating leases	$ 1,358	$ 1,225
Operating cash flows from finance leases	66	86
Financing cash flows from finance leases	660	667
Right of use assets obtained in exchange for new operating lease liabilities	0	156
Right of use assets obtained in exchange for new finance lease liabilities	864	87
Right-of-use assets disposed or adjusted modifying operating leases liabilities	(1,276)	36
Right-of-use assets disposed or adjusted modifying finance leases liabilities	$ (19)	$ 0

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Commitments and Contingencies - Narrative (Details) - USD ($)				3 Months Ended
	Jan. 26, 2022	Apr. 17, 2020	Jan. 23, 2020	Mar. 31, 2022
Loss Contingencies [Line Items]
Payment to acquire workers' compensation and general liability insurance				$ 250,000
Malpractice insurance, annual coverage limit				4,400,000
Surety Bond
Loss Contingencies [Line Items]
Debt outstanding				$ 134,900,000
Bernards Bros vs. Limbach Holdings, Inc. | Pending Litigation
Loss Contingencies [Line Items]
Loss contingency, damages sought, value			$ 3,000,000
LA Excavating, Inc. vs. Limbach Company LP | Pending Litigation
Loss Contingencies [Line Items]
Loss contingency, damages sought, value		$ 1,000,000
Suffolk Construction Company, Inc. | Pending Litigation
Loss Contingencies [Line Items]
Loss contingency, damages sought, value	$ 300,000

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Commitments and Contingencies - Components of Self-Insurance Liability (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Current liability — workers’ compensation and general liability	$ 173	$ 184
Current liability — medical and dental	373	456
Non-current liability	447	451
Total liability	993	1,091
Restricted cash	$ 113	$ 113

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Management Incentive Plans - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 09, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized stock-based compensation	$ 599	$ 677
2021 Amended And Restated Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, capital shares reserved for future issuance (in shares)			2,250,000
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, vesting period	3 years
RSUs | Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, vesting period	1 year
PRSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, vesting period	3 years
Recognized stock-based compensation	$ 200	200
PRSUs | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares to be issued under grant	0.00%
PRSUs | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares to be issued under grant	150.00%
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of awards vested	$ 1,100	$ 1,300
Unrecognized share-based costs	$ 5,000
Weighted average period to recognize share-based costs	1 year 11 months 19 days
Market-Based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance target, price per share (in dollars per share)	$ 18.00
Number of consecutive trading days within performance period to meet target share price	80 days
Performance period	3 years

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Management Incentive Plans - RSUs Activity (Details) - RSUs	3 Months Ended
	Mar. 31, 2022 $ / shares shares
Awards
Unvested at December 31, 2021 (in shares) | shares	266,089
Granted (in shares) | shares	180,739
Vested (in shares) | shares	(120,401)
Forfeited (in shares) | shares	(10,958)
Unvested at March 31, 2022 (in shares) | shares	315,469
Weighted-Average Grant Date Fair Value
Unvested at December 31, 2021 (usd per share) | $ / shares	$ 8.45
Granted (usd per share) | $ / shares	9.00
Vested (usd per share) | $ / shares	7.43
Forfeited (usd per share) | $ / shares	9.29
Unvested at March 31, 2022 (usd per share) | $ / shares	$ 9.13

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Management Incentive Plans - PRSUs Activity (Details) - PRSUs	3 Months Ended
	Mar. 31, 2022 $ / shares shares
Awards
Unvested at December 31, 2021 (in shares) | shares	280,700
Granted (in shares) | shares	249,885
Vested (in shares) | shares	0
Forfeited (in shares) | shares	(6,500)
Unvested at March 31, 2022 (in shares) | shares	524,085
Weighted-Average Grant Date Fair Value
Unvested at December 31, 2021 (usd per share) | $ / shares	$ 9.46
Granted (usd per share) | $ / shares	7.17
Vested (usd per share) | $ / shares	0
Forfeited (usd per share) | $ / shares	9.04
Unvested at March 31, 2022 (usd per share) | $ / shares	$ 8.38

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Management Incentive Plans - MRSUs Activity (Details) - Market-Based RSUs	3 Months Ended
	Mar. 31, 2022 $ / shares shares
Awards
Unvested at December 31, 2021 (in shares) | shares	102,500
Granted (in shares) | shares	0
Vested (in shares) | shares	0
Forfeited (in shares) | shares	0
Unvested at March 31, 2022 (in shares) | shares	102,500
Weighted-Average Grant Date Fair Value
Unvested at December 31, 2021 (usd per share) | $ / shares	$ 8.26
Granted (usd per share) | $ / shares	0
Vested (usd per share) | $ / shares	0
Forfeited (usd per share) | $ / shares	0
Unvested at March 31, 2022 (usd per share) | $ / shares	$ 8.26